./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 17db2a72807ac377d533a347dbb668103ea580a0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:59:42,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:59:42,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:59:42,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:59:42,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:59:42,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:59:42,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:59:42,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:59:42,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:59:42,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:59:42,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:59:42,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:59:42,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:59:42,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:59:42,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:59:42,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:59:42,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:59:42,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:59:42,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:59:42,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:59:42,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:59:42,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:59:42,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:59:42,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:59:42,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:59:42,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:59:42,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:59:42,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:59:42,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:59:42,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:59:42,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:59:42,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:59:42,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:59:42,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:59:42,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:59:42,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:59:42,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:59:42,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:59:42,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:59:42,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:59:42,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:59:42,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 15:59:42,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:59:42,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:59:42,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:59:42,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:59:42,905 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:59:42,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:59:42,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:59:42,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:59:42,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:59:42,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:59:42,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:59:42,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:59:42,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:59:42,908 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/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 -> 17db2a72807ac377d533a347dbb668103ea580a0 [2019-12-07 15:59:43,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:59:43,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:59:43,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:59:43,033 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:59:43,033 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:59:43,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-12-07 15:59:43,077 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/data/47de291f0/8009feba312d44ac8e83f6d0b1d042c4/FLAG0065a727f [2019-12-07 15:59:43,478 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:59:43,479 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-12-07 15:59:43,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/data/47de291f0/8009feba312d44ac8e83f6d0b1d042c4/FLAG0065a727f [2019-12-07 15:59:43,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/data/47de291f0/8009feba312d44ac8e83f6d0b1d042c4 [2019-12-07 15:59:43,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:59:43,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:59:43,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:59:43,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:59:43,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:59:43,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545433eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43, skipping insertion in model container [2019-12-07 15:59:43,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:59:43,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:59:43,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:59:43,621 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:59:43,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:59:43,673 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:59:43,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43 WrapperNode [2019-12-07 15:59:43,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:59:43,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:59:43,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:59:43,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:59:43,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:59:43,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:59:43,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:59:43,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:59:43,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... [2019-12-07 15:59:43,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:59:43,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:59:43,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:59:43,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:59:43,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:59:43,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:59:43,744 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-12-07 15:59:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-12-07 15:59:43,838 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:59:43,838 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 15:59:43,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:59:43 BoogieIcfgContainer [2019-12-07 15:59:43,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:59:43,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:59:43,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:59:43,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:59:43,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:59:43" (1/3) ... [2019-12-07 15:59:43,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139c8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:59:43, skipping insertion in model container [2019-12-07 15:59:43,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:59:43" (2/3) ... [2019-12-07 15:59:43,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139c8edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:59:43, skipping insertion in model container [2019-12-07 15:59:43,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:59:43" (3/3) ... [2019-12-07 15:59:43,844 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2019-12-07 15:59:43,850 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:59:43,855 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:59:43,862 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:59:43,877 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:59:43,877 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:59:43,877 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:59:43,877 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:59:43,877 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:59:43,877 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:59:43,877 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:59:43,877 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:59:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 15:59:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 15:59:43,891 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:43,891 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:43,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-12-07 15:59:43,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:43,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441899176] [2019-12-07 15:59:43,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:59:44,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441899176] [2019-12-07 15:59:44,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:59:44,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 15:59:44,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844829178] [2019-12-07 15:59:44,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 15:59:44,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:44,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 15:59:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 15:59:44,058 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-12-07 15:59:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:44,140 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-12-07 15:59:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:59:44,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 15:59:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:44,148 INFO L225 Difference]: With dead ends: 24 [2019-12-07 15:59:44,148 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 15:59:44,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 15:59:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 15:59:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 15:59:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 15:59:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 15:59:44,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 15:59:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:44,178 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 15:59:44,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 15:59:44,178 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 15:59:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 15:59:44,179 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:44,179 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:44,179 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-12-07 15:59:44,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:44,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28668990] [2019-12-07 15:59:44,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:59:44,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28668990] [2019-12-07 15:59:44,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215100519] [2019-12-07 15:59:44,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 15:59:44,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 15:59:44,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:44,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-12-07 15:59:44,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193991984] [2019-12-07 15:59:44,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 15:59:44,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 15:59:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-12-07 15:59:44,345 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-12-07 15:59:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:44,390 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-12-07 15:59:44,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 15:59:44,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-07 15:59:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:44,391 INFO L225 Difference]: With dead ends: 21 [2019-12-07 15:59:44,391 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 15:59:44,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:59:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 15:59:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 15:59:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 15:59:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-12-07 15:59:44,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-12-07 15:59:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:44,396 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-12-07 15:59:44,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 15:59:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-12-07 15:59:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 15:59:44,396 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:44,397 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:44,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:44,598 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-12-07 15:59:44,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:44,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088554924] [2019-12-07 15:59:44,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 15:59:44,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088554924] [2019-12-07 15:59:44,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474263765] [2019-12-07 15:59:44,784 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:44,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:59:44,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:44,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 15:59:44,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 15:59:44,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:44,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-12-07 15:59:44,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104407739] [2019-12-07 15:59:44,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 15:59:44,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:44,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 15:59:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-12-07 15:59:44,828 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-12-07 15:59:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:44,875 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-12-07 15:59:44,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 15:59:44,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-12-07 15:59:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:44,876 INFO L225 Difference]: With dead ends: 24 [2019-12-07 15:59:44,876 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 15:59:44,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:59:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 15:59:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 15:59:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 15:59:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-12-07 15:59:44,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-12-07 15:59:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:44,880 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-12-07 15:59:44,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 15:59:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-12-07 15:59:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 15:59:44,881 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:44,881 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:45,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:45,082 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-12-07 15:59:45,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:45,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565397854] [2019-12-07 15:59:45,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 15:59:45,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565397854] [2019-12-07 15:59:45,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213780162] [2019-12-07 15:59:45,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:45,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 15:59:45,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:45,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 15:59:45,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 15:59:45,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:45,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-12-07 15:59:45,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496814015] [2019-12-07 15:59:45,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 15:59:45,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:45,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 15:59:45,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-12-07 15:59:45,234 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-12-07 15:59:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:45,288 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-12-07 15:59:45,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 15:59:45,288 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-12-07 15:59:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:45,289 INFO L225 Difference]: With dead ends: 27 [2019-12-07 15:59:45,289 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 15:59:45,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-12-07 15:59:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 15:59:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 15:59:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 15:59:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-12-07 15:59:45,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-12-07 15:59:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:45,295 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-12-07 15:59:45,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 15:59:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-12-07 15:59:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 15:59:45,296 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:45,297 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:45,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:45,498 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:45,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-12-07 15:59:45,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:45,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218424862] [2019-12-07 15:59:45,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 15:59:45,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218424862] [2019-12-07 15:59:45,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873718948] [2019-12-07 15:59:45,648 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:45,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:59:45,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:45,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 15:59:45,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 15:59:45,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:45,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-12-07 15:59:45,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921434916] [2019-12-07 15:59:45,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 15:59:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:45,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 15:59:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 15:59:45,703 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-12-07 15:59:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:45,767 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-12-07 15:59:45,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 15:59:45,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-12-07 15:59:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:45,768 INFO L225 Difference]: With dead ends: 30 [2019-12-07 15:59:45,768 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 15:59:45,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 15:59:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 15:59:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 15:59:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 15:59:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-12-07 15:59:45,772 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-12-07 15:59:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:45,773 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-12-07 15:59:45,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 15:59:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-12-07 15:59:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 15:59:45,774 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:45,774 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:45,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:45,975 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-12-07 15:59:45,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:45,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496257128] [2019-12-07 15:59:45,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 15:59:46,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496257128] [2019-12-07 15:59:46,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626474217] [2019-12-07 15:59:46,234 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:46,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 15:59:46,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:46,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 15:59:46,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-12-07 15:59:46,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:46,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-12-07 15:59:46,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542358136] [2019-12-07 15:59:46,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 15:59:46,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:46,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 15:59:46,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-12-07 15:59:46,283 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-12-07 15:59:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:46,364 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-12-07 15:59:46,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 15:59:46,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-12-07 15:59:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:46,365 INFO L225 Difference]: With dead ends: 33 [2019-12-07 15:59:46,365 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 15:59:46,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-12-07 15:59:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 15:59:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-12-07 15:59:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 15:59:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-12-07 15:59:46,369 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-12-07 15:59:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:46,369 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-12-07 15:59:46,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 15:59:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-12-07 15:59:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 15:59:46,370 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:46,371 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:46,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:46,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:46,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-12-07 15:59:46,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:46,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206868582] [2019-12-07 15:59:46,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 15:59:46,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206868582] [2019-12-07 15:59:46,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324430219] [2019-12-07 15:59:46,716 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:46,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 15:59:46,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:46,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 15:59:46,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-12-07 15:59:46,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:46,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-12-07 15:59:46,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192204682] [2019-12-07 15:59:46,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 15:59:46,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 15:59:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 15:59:46,768 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-12-07 15:59:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:46,846 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-12-07 15:59:46,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 15:59:46,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-12-07 15:59:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:46,847 INFO L225 Difference]: With dead ends: 36 [2019-12-07 15:59:46,847 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 15:59:46,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-12-07 15:59:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 15:59:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-07 15:59:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 15:59:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-12-07 15:59:46,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-12-07 15:59:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:46,851 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-12-07 15:59:46,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 15:59:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-12-07 15:59:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-12-07 15:59:46,852 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:46,852 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:47,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:47,054 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-12-07 15:59:47,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:47,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745661010] [2019-12-07 15:59:47,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 15:59:47,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745661010] [2019-12-07 15:59:47,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707048831] [2019-12-07 15:59:47,238 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 15:59:47,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-12-07 15:59:47,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:47,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-12-07 15:59:47,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192340381] [2019-12-07 15:59:47,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 15:59:47,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 15:59:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-12-07 15:59:47,291 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-12-07 15:59:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:47,373 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-12-07 15:59:47,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 15:59:47,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-12-07 15:59:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:47,374 INFO L225 Difference]: With dead ends: 39 [2019-12-07 15:59:47,374 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 15:59:47,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-12-07 15:59:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 15:59:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-12-07 15:59:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 15:59:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-12-07 15:59:47,379 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-12-07 15:59:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:47,380 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-12-07 15:59:47,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 15:59:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-12-07 15:59:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 15:59:47,381 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:47,381 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:47,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:47,581 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-12-07 15:59:47,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:47,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63319695] [2019-12-07 15:59:47,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 15:59:47,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63319695] [2019-12-07 15:59:47,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162550288] [2019-12-07 15:59:47,757 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:47,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:59:47,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:47,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 15:59:47,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 15:59:47,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:47,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-12-07 15:59:47,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861138263] [2019-12-07 15:59:47,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 15:59:47,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 15:59:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-07 15:59:47,814 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-12-07 15:59:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:47,899 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-12-07 15:59:47,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 15:59:47,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-12-07 15:59:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:47,900 INFO L225 Difference]: With dead ends: 42 [2019-12-07 15:59:47,900 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 15:59:47,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-12-07 15:59:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 15:59:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 15:59:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 15:59:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-12-07 15:59:47,904 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-12-07 15:59:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:47,904 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-12-07 15:59:47,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 15:59:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-12-07 15:59:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 15:59:47,905 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:47,905 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:48,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:48,107 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-12-07 15:59:48,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:48,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480497125] [2019-12-07 15:59:48,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 15:59:48,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480497125] [2019-12-07 15:59:48,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198473215] [2019-12-07 15:59:48,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:48,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 15:59:48,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:48,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 15:59:48,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 15:59:48,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:48,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-12-07 15:59:48,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163134506] [2019-12-07 15:59:48,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 15:59:48,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 15:59:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 15:59:48,423 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-12-07 15:59:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:48,536 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-12-07 15:59:48,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 15:59:48,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-12-07 15:59:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:48,537 INFO L225 Difference]: With dead ends: 45 [2019-12-07 15:59:48,537 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 15:59:48,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-12-07 15:59:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 15:59:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 15:59:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 15:59:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-12-07 15:59:48,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-12-07 15:59:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:48,542 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-12-07 15:59:48,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 15:59:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-12-07 15:59:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 15:59:48,543 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:48,543 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:48,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:48,744 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-12-07 15:59:48,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:48,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556634811] [2019-12-07 15:59:48,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 15:59:48,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556634811] [2019-12-07 15:59:48,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372832590] [2019-12-07 15:59:48,975 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:49,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:59:49,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:49,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 15:59:49,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-12-07 15:59:49,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:49,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-12-07 15:59:49,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957001782] [2019-12-07 15:59:49,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 15:59:49,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 15:59:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-07 15:59:49,036 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-12-07 15:59:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:49,156 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-12-07 15:59:49,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 15:59:49,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-12-07 15:59:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:49,157 INFO L225 Difference]: With dead ends: 48 [2019-12-07 15:59:49,157 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 15:59:49,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-12-07 15:59:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 15:59:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 15:59:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 15:59:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-12-07 15:59:49,162 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-12-07 15:59:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:49,162 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-12-07 15:59:49,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 15:59:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-12-07 15:59:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 15:59:49,163 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:49,163 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:49,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:49,365 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-12-07 15:59:49,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:49,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662183806] [2019-12-07 15:59:49,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 15:59:49,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662183806] [2019-12-07 15:59:49,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374781535] [2019-12-07 15:59:49,717 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:49,754 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 15:59:49,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:49,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 15:59:49,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-12-07 15:59:49,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:49,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-12-07 15:59:49,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980334375] [2019-12-07 15:59:49,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 15:59:49,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 15:59:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-07 15:59:49,783 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-12-07 15:59:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:49,900 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-12-07 15:59:49,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 15:59:49,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-12-07 15:59:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:49,901 INFO L225 Difference]: With dead ends: 51 [2019-12-07 15:59:49,901 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 15:59:49,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-12-07 15:59:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 15:59:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 15:59:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 15:59:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-12-07 15:59:49,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-12-07 15:59:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:49,907 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-12-07 15:59:49,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 15:59:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-12-07 15:59:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-12-07 15:59:49,908 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:49,908 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:50,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:50,110 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-12-07 15:59:50,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:50,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218476456] [2019-12-07 15:59:50,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 15:59:50,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218476456] [2019-12-07 15:59:50,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718754453] [2019-12-07 15:59:50,558 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:50,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 15:59:50,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:50,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 15:59:50,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-12-07 15:59:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-12-07 15:59:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046965177] [2019-12-07 15:59:50,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 15:59:50,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 15:59:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-12-07 15:59:50,631 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-12-07 15:59:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:50,754 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-12-07 15:59:50,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 15:59:50,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-12-07 15:59:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:50,755 INFO L225 Difference]: With dead ends: 54 [2019-12-07 15:59:50,755 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 15:59:50,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 15:59:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 15:59:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 15:59:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 15:59:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-12-07 15:59:50,759 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-12-07 15:59:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:50,759 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-12-07 15:59:50,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 15:59:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-12-07 15:59:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 15:59:50,760 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:50,760 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:50,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:50,961 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-12-07 15:59:50,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:50,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701975689] [2019-12-07 15:59:50,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 15:59:51,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701975689] [2019-12-07 15:59:51,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734371525] [2019-12-07 15:59:51,263 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 15:59:51,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-12-07 15:59:51,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:51,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-12-07 15:59:51,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659619993] [2019-12-07 15:59:51,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 15:59:51,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 15:59:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-07 15:59:51,323 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-12-07 15:59:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:51,449 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-12-07 15:59:51,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 15:59:51,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-12-07 15:59:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:51,450 INFO L225 Difference]: With dead ends: 57 [2019-12-07 15:59:51,450 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 15:59:51,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 15:59:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 15:59:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-12-07 15:59:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 15:59:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-12-07 15:59:51,454 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-12-07 15:59:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:51,455 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-12-07 15:59:51,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 15:59:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-12-07 15:59:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-12-07 15:59:51,455 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:51,456 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:51,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:51,657 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-12-07 15:59:51,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:51,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185998622] [2019-12-07 15:59:51,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 15:59:52,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185998622] [2019-12-07 15:59:52,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063776453] [2019-12-07 15:59:52,024 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:52,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 15:59:52,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:52,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 15:59:52,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-12-07 15:59:52,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:52,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-12-07 15:59:52,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716385612] [2019-12-07 15:59:52,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 15:59:52,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:52,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 15:59:52,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-12-07 15:59:52,088 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-12-07 15:59:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:52,223 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-12-07 15:59:52,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 15:59:52,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-12-07 15:59:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:52,224 INFO L225 Difference]: With dead ends: 60 [2019-12-07 15:59:52,224 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 15:59:52,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 15:59:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 15:59:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-07 15:59:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-07 15:59:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-12-07 15:59:52,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-12-07 15:59:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:52,228 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-12-07 15:59:52,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 15:59:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-12-07 15:59:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-12-07 15:59:52,229 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:52,229 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:52,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:52,430 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:52,430 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-12-07 15:59:52,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:52,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039665187] [2019-12-07 15:59:52,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 15:59:52,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039665187] [2019-12-07 15:59:52,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243834446] [2019-12-07 15:59:52,747 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:52,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 15:59:52,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:52,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 15:59:52,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-12-07 15:59:52,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:52,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-12-07 15:59:52,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637593333] [2019-12-07 15:59:52,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 15:59:52,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 15:59:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-07 15:59:52,830 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2019-12-07 15:59:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:52,971 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-12-07 15:59:52,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 15:59:52,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-12-07 15:59:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:52,972 INFO L225 Difference]: With dead ends: 63 [2019-12-07 15:59:52,972 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 15:59:52,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 15:59:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 15:59:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-12-07 15:59:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 15:59:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-12-07 15:59:52,976 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-12-07 15:59:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:52,976 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-12-07 15:59:52,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 15:59:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-12-07 15:59:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 15:59:52,977 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:52,977 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:53,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:53,178 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-12-07 15:59:53,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:53,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974923987] [2019-12-07 15:59:53,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 15:59:53,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974923987] [2019-12-07 15:59:53,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261429541] [2019-12-07 15:59:53,563 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:53,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 15:59:53,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:53,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 15:59:53,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-12-07 15:59:53,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:53,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-12-07 15:59:53,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208140933] [2019-12-07 15:59:53,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 15:59:53,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 15:59:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-12-07 15:59:53,632 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 24 states. [2019-12-07 15:59:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:53,797 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-12-07 15:59:53,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 15:59:53,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2019-12-07 15:59:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:53,798 INFO L225 Difference]: With dead ends: 66 [2019-12-07 15:59:53,798 INFO L226 Difference]: Without dead ends: 62 [2019-12-07 15:59:53,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 15:59:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-07 15:59:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-07 15:59:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-07 15:59:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-12-07 15:59:53,802 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-12-07 15:59:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:53,802 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-12-07 15:59:53,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 15:59:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-12-07 15:59:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-12-07 15:59:53,803 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:53,803 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:54,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:54,005 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-12-07 15:59:54,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:54,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904603245] [2019-12-07 15:59:54,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 15:59:54,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904603245] [2019-12-07 15:59:54,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157781482] [2019-12-07 15:59:54,471 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:54,516 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 15:59:54,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:54,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 15:59:54,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-12-07 15:59:54,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:54,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2019-12-07 15:59:54,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144874280] [2019-12-07 15:59:54,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 15:59:54,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 15:59:54,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-12-07 15:59:54,549 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 25 states. [2019-12-07 15:59:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:54,719 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-12-07 15:59:54,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 15:59:54,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-12-07 15:59:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:54,720 INFO L225 Difference]: With dead ends: 69 [2019-12-07 15:59:54,720 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 15:59:54,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=1209, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 15:59:54,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 15:59:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-12-07 15:59:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-12-07 15:59:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-12-07 15:59:54,723 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-12-07 15:59:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:54,724 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-12-07 15:59:54,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 15:59:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-12-07 15:59:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 15:59:54,725 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:54,725 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:54,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:54,925 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-12-07 15:59:54,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:54,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610498465] [2019-12-07 15:59:54,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 15:59:55,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610498465] [2019-12-07 15:59:55,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085563373] [2019-12-07 15:59:55,373 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:55,420 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 15:59:55,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 15:59:55,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 15:59:55,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 15:59:55,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:55,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-12-07 15:59:55,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213983588] [2019-12-07 15:59:55,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 15:59:55,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 15:59:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-12-07 15:59:55,455 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-12-07 15:59:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:55,637 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-12-07 15:59:55,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 15:59:55,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-12-07 15:59:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:55,638 INFO L225 Difference]: With dead ends: 72 [2019-12-07 15:59:55,638 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 15:59:55,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=658, Invalid=1322, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 15:59:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 15:59:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-07 15:59:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-07 15:59:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-12-07 15:59:55,641 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-12-07 15:59:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:55,641 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-12-07 15:59:55,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 15:59:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-12-07 15:59:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-12-07 15:59:55,642 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:55,642 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:55,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:55,843 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-12-07 15:59:55,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:55,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988905561] [2019-12-07 15:59:55,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 15:59:56,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988905561] [2019-12-07 15:59:56,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618154690] [2019-12-07 15:59:56,384 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/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 [2019-12-07 15:59:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:59:56,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 15:59:56,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 15:59:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 15:59:56,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 15:59:56,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2019-12-07 15:59:56,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100655758] [2019-12-07 15:59:56,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 15:59:56,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:59:56,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 15:59:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-12-07 15:59:56,461 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2019-12-07 15:59:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:59:56,643 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-12-07 15:59:56,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 15:59:56,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-12-07 15:59:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:59:56,644 INFO L225 Difference]: With dead ends: 75 [2019-12-07 15:59:56,644 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 15:59:56,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=722, Invalid=1440, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 15:59:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 15:59:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-12-07 15:59:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-07 15:59:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-12-07 15:59:56,648 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-12-07 15:59:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:59:56,648 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-12-07 15:59:56,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 15:59:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-12-07 15:59:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 15:59:56,648 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:59:56,649 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:59:56,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:59:56,849 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:59:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:59:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-12-07 15:59:56,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:59:56,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661405439] [2019-12-07 15:59:56,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:59:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:59:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:59:56,910 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:59:56,910 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 15:59:56,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:59:56 BoogieIcfgContainer [2019-12-07 15:59:56,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:59:56,941 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:59:56,941 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:59:56,941 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:59:56,941 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:59:43" (3/4) ... [2019-12-07 15:59:56,942 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 15:59:56,981 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c8bc4e99-bce7-4876-adbc-38cb67e8a0f2/bin/uautomizer/witness.graphml [2019-12-07 15:59:56,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:59:56,983 INFO L168 Benchmark]: Toolchain (without parser) took 13486.16 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 315.6 MB). Free memory was 943.5 MB in the beginning and 1.0 GB in the end (delta: -81.7 MB). Peak memory consumption was 233.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:59:56,983 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:59:56,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:59:56,983 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:59:56,984 INFO L168 Benchmark]: Boogie Preprocessor took 10.19 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:59:56,984 INFO L168 Benchmark]: RCFGBuilder took 134.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 15:59:56,984 INFO L168 Benchmark]: TraceAbstraction took 13100.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 198.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 66.9 MB). Peak memory consumption was 265.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:59:56,984 INFO L168 Benchmark]: Witness Printer took 40.82 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-12-07 15:59:56,986 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 177.10 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.19 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 134.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13100.40 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 198.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 66.9 MB). Peak memory consumption was 265.6 MB. Max. memory is 11.5 GB. * Witness Printer took 40.82 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 13.0s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 162 SDtfs, 730 SDslu, 984 SDs, 0 SdLazy, 1203 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2212 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 2760 NumberOfCodeBlocks, 2760 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2592 ConstructedInterpolants, 0 QuantifiedInterpolants, 579952 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3971 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...