./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 0.1.24-cad4683 [2019-11-16 00:28:01,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:28:01,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:28:01,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:28:01,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:28:01,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:28:01,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:28:01,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:28:01,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:28:01,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:28:01,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:28:01,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:28:01,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:28:01,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:28:01,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:28:01,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:28:01,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:28:01,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:28:01,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:28:01,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:28:01,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:28:01,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:28:01,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:28:01,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:28:01,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:28:01,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:28:01,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:28:01,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:28:01,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:28:01,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:28:01,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:28:01,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:28:01,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:28:01,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:28:01,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:28:01,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:28:01,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:28:01,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:28:01,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:28:01,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:28:01,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:28:01,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:28:01,874 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:28:01,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:28:01,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:28:01,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:28:01,885 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:28:01,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:28:01,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:28:01,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:28:01,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:28:01,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:28:01,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:28:01,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:28:01,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:28:01,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:28:01,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:28:01,889 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:28:01,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:28:01,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:28:01,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:28:01,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:28:01,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:28:01,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:28:01,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:28:01,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:28:01,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:28:01,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:28:01,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:28:01,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:28:01,892 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_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:01,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:28:01,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:28:01,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:28:01,939 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:28:01,939 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:28:01,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-11-16 00:28:01,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/data/e1e6e4d63/62ca6fd13bd04de0aed097371233e810/FLAG6b9bed57f [2019-11-16 00:28:02,386 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:28:02,386 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2019-11-16 00:28:02,391 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/data/e1e6e4d63/62ca6fd13bd04de0aed097371233e810/FLAG6b9bed57f [2019-11-16 00:28:02,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/data/e1e6e4d63/62ca6fd13bd04de0aed097371233e810 [2019-11-16 00:28:02,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:28:02,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:28:02,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:28:02,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:28:02,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:28:02,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:28:02" (1/1) ... [2019-11-16 00:28:02,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a080ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:02, skipping insertion in model container [2019-11-16 00:28:02,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:28:02" (1/1) ... [2019-11-16 00:28:02,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:28:02,809 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:28:02,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:28:02,964 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:28:03,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:28:03,076 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:28:03,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03 WrapperNode [2019-11-16 00:28:03,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:28:03,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:28:03,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:28:03,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:28:03,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:28:03,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:28:03,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:28:03,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:28:03,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... [2019-11-16 00:28:03,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:28:03,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:28:03,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:28:03,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:28:03,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:28:03,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:28:03,174 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-16 00:28:03,174 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-16 00:28:03,300 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:28:03,300 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-16 00:28:03,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:28:03 BoogieIcfgContainer [2019-11-16 00:28:03,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:28:03,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:28:03,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:28:03,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:28:03,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:28:02" (1/3) ... [2019-11-16 00:28:03,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d23f8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:28:03, skipping insertion in model container [2019-11-16 00:28:03,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:28:03" (2/3) ... [2019-11-16 00:28:03,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d23f8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:28:03, skipping insertion in model container [2019-11-16 00:28:03,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:28:03" (3/3) ... [2019-11-16 00:28:03,309 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2019-11-16 00:28:03,316 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:28:03,321 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:28:03,330 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:28:03,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:28:03,351 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:28:03,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:28:03,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:28:03,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:28:03,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:28:03,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:28:03,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:28:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-16 00:28:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-16 00:28:03,372 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:03,372 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:03,374 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-16 00:28:03,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:03,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568833643] [2019-11-16 00:28:03,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:03,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:03,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:28:03,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568833643] [2019-11-16 00:28:03,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:28:03,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-16 00:28:03,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259598103] [2019-11-16 00:28:03,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-16 00:28:03,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-16 00:28:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:28:03,629 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-16 00:28:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:03,772 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-16 00:28:03,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:28:03,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-16 00:28:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:03,784 INFO L225 Difference]: With dead ends: 24 [2019-11-16 00:28:03,785 INFO L226 Difference]: Without dead ends: 14 [2019-11-16 00:28:03,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:28:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-16 00:28:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-16 00:28:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-16 00:28:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-16 00:28:03,819 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-16 00:28:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:03,819 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-16 00:28:03,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-16 00:28:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-16 00:28:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-16 00:28:03,820 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:03,820 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:03,821 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-16 00:28:03,821 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:03,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534123733] [2019-11-16 00:28:03,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:03,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:03,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:28:03,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534123733] [2019-11-16 00:28:03,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808890989] [2019-11-16 00:28:03,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:04,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-16 00:28:04,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:28:04,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:04,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-16 00:28:04,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892977543] [2019-11-16 00:28:04,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:28:04,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:28:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:28:04,107 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2019-11-16 00:28:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:04,196 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-16 00:28:04,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:28:04,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-11-16 00:28:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:04,197 INFO L225 Difference]: With dead ends: 21 [2019-11-16 00:28:04,197 INFO L226 Difference]: Without dead ends: 17 [2019-11-16 00:28:04,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:28:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-16 00:28:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-16 00:28:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-16 00:28:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-16 00:28:04,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-16 00:28:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:04,203 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-16 00:28:04,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:28:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-16 00:28:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-16 00:28:04,205 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:04,205 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:04,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:04,410 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-16 00:28:04,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:04,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651013360] [2019-11-16 00:28:04,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:04,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:04,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:28:04,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651013360] [2019-11-16 00:28:04,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152752958] [2019-11-16 00:28:04,580 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:04,619 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:28:04,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:04,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:28:04,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:28:04,647 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:04,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-16 00:28:04,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618385400] [2019-11-16 00:28:04,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-16 00:28:04,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-16 00:28:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:28:04,649 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-16 00:28:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:04,731 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-16 00:28:04,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:28:04,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-16 00:28:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:04,732 INFO L225 Difference]: With dead ends: 24 [2019-11-16 00:28:04,732 INFO L226 Difference]: Without dead ends: 20 [2019-11-16 00:28:04,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:28:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-16 00:28:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-16 00:28:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-16 00:28:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-16 00:28:04,737 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-16 00:28:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:04,738 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-16 00:28:04,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-16 00:28:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-16 00:28:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-16 00:28:04,739 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:04,740 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:04,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:04,948 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-16 00:28:04,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:04,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467330098] [2019-11-16 00:28:04,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:04,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:04,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-16 00:28:05,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467330098] [2019-11-16 00:28:05,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981925159] [2019-11-16 00:28:05,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:05,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-16 00:28:05,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:05,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:28:05,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-16 00:28:05,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:05,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-16 00:28:05,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141859391] [2019-11-16 00:28:05,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-16 00:28:05,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-16 00:28:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:28:05,216 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 11 states. [2019-11-16 00:28:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:05,320 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-16 00:28:05,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:28:05,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-16 00:28:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:05,322 INFO L225 Difference]: With dead ends: 27 [2019-11-16 00:28:05,322 INFO L226 Difference]: Without dead ends: 23 [2019-11-16 00:28:05,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:28:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-16 00:28:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-16 00:28:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-16 00:28:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-16 00:28:05,327 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-16 00:28:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:05,327 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-16 00:28:05,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-16 00:28:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-16 00:28:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-16 00:28:05,329 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:05,329 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:05,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:05,535 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-16 00:28:05,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:05,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088173132] [2019-11-16 00:28:05,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:05,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:05,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-16 00:28:05,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088173132] [2019-11-16 00:28:05,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218364275] [2019-11-16 00:28:05,732 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:05,772 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:28:05,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:05,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:28:05,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-16 00:28:05,816 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:05,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-11-16 00:28:05,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264959194] [2019-11-16 00:28:05,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:28:05,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:28:05,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:28:05,820 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-16 00:28:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:05,959 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-16 00:28:05,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-16 00:28:05,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2019-11-16 00:28:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:05,960 INFO L225 Difference]: With dead ends: 30 [2019-11-16 00:28:05,960 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:28:05,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:28:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:28:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-16 00:28:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:28:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-16 00:28:05,968 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-16 00:28:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:05,968 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-16 00:28:05,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:28:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-16 00:28:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-16 00:28:05,970 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:05,970 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:06,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:06,178 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-16 00:28:06,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:06,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182585458] [2019-11-16 00:28:06,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:06,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:06,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-16 00:28:06,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182585458] [2019-11-16 00:28:06,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576210145] [2019-11-16 00:28:06,401 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:06,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-16 00:28:06,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:06,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-16 00:28:06,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-16 00:28:06,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:06,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-16 00:28:06,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890532652] [2019-11-16 00:28:06,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-16 00:28:06,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-16 00:28:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:28:06,501 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-16 00:28:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:06,643 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-16 00:28:06,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-16 00:28:06,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-16 00:28:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:06,645 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:28:06,645 INFO L226 Difference]: Without dead ends: 29 [2019-11-16 00:28:06,646 INFO L600 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 [2019-11-16 00:28:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-16 00:28:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-16 00:28:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-16 00:28:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-16 00:28:06,655 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-16 00:28:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:06,655 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-16 00:28:06,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-16 00:28:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-16 00:28:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-16 00:28:06,657 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:06,657 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:06,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:06,858 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-16 00:28:06,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:06,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233256047] [2019-11-16 00:28:06,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:06,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:06,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-16 00:28:07,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233256047] [2019-11-16 00:28:07,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827111495] [2019-11-16 00:28:07,110 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:07,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-16 00:28:07,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:07,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-16 00:28:07,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-16 00:28:07,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:07,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-16 00:28:07,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013930193] [2019-11-16 00:28:07,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:28:07,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:28:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:28:07,202 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-16 00:28:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:07,351 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-16 00:28:07,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-16 00:28:07,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-16 00:28:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:07,353 INFO L225 Difference]: With dead ends: 36 [2019-11-16 00:28:07,353 INFO L226 Difference]: Without dead ends: 32 [2019-11-16 00:28:07,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:28:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-16 00:28:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-16 00:28:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-16 00:28:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-16 00:28:07,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-16 00:28:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:07,363 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-16 00:28:07,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:28:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-16 00:28:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-16 00:28:07,370 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:07,370 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:07,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:07,573 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-16 00:28:07,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:07,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492091814] [2019-11-16 00:28:07,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:07,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:07,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-16 00:28:07,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492091814] [2019-11-16 00:28:07,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798286105] [2019-11-16 00:28:07,817 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:07,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-16 00:28:07,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-16 00:28:07,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:07,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-16 00:28:07,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640907856] [2019-11-16 00:28:07,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-16 00:28:07,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-16 00:28:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:28:07,932 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2019-11-16 00:28:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:08,097 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-16 00:28:08,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-16 00:28:08,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-16 00:28:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:08,099 INFO L225 Difference]: With dead ends: 39 [2019-11-16 00:28:08,099 INFO L226 Difference]: Without dead ends: 35 [2019-11-16 00:28:08,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:28:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-16 00:28:08,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-16 00:28:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-16 00:28:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-16 00:28:08,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-16 00:28:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:08,105 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-16 00:28:08,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-16 00:28:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-16 00:28:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-16 00:28:08,108 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:08,108 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:08,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:08,312 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-16 00:28:08,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:08,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117606227] [2019-11-16 00:28:08,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:08,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:08,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-16 00:28:08,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117606227] [2019-11-16 00:28:08,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304910942] [2019-11-16 00:28:08,618 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:08,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:28:08,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:08,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-16 00:28:08,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-16 00:28:08,732 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:08,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2019-11-16 00:28:08,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429169749] [2019-11-16 00:28:08,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-16 00:28:08,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:08,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-16 00:28:08,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-16 00:28:08,737 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 16 states. [2019-11-16 00:28:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:08,893 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-16 00:28:08,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:28:08,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-11-16 00:28:08,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:08,894 INFO L225 Difference]: With dead ends: 42 [2019-11-16 00:28:08,894 INFO L226 Difference]: Without dead ends: 38 [2019-11-16 00:28:08,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:28:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-16 00:28:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-16 00:28:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-16 00:28:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-16 00:28:08,903 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-16 00:28:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:08,904 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-16 00:28:08,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-16 00:28:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-16 00:28:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-16 00:28:08,905 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:08,905 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:09,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:09,110 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-16 00:28:09,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:09,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798460618] [2019-11-16 00:28:09,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:09,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:09,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-16 00:28:09,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798460618] [2019-11-16 00:28:09,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120417997] [2019-11-16 00:28:09,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:09,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-16 00:28:09,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:09,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-16 00:28:09,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-16 00:28:09,658 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:09,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-11-16 00:28:09,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488138878] [2019-11-16 00:28:09,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-16 00:28:09,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-16 00:28:09,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:28:09,660 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-16 00:28:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:09,846 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-16 00:28:09,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:28:09,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2019-11-16 00:28:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:09,847 INFO L225 Difference]: With dead ends: 45 [2019-11-16 00:28:09,848 INFO L226 Difference]: Without dead ends: 41 [2019-11-16 00:28:09,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:28:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-16 00:28:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-16 00:28:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-16 00:28:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-16 00:28:09,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-16 00:28:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:09,854 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-16 00:28:09,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-16 00:28:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-16 00:28:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-16 00:28:09,855 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:09,855 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:10,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:10,064 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-16 00:28:10,066 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:10,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440490349] [2019-11-16 00:28:10,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:10,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:10,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-16 00:28:10,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440490349] [2019-11-16 00:28:10,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507741212] [2019-11-16 00:28:10,428 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:10,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:28:10,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:10,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-16 00:28:10,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-16 00:28:10,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:10,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-11-16 00:28:10,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23893694] [2019-11-16 00:28:10,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-16 00:28:10,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-16 00:28:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-11-16 00:28:10,526 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 18 states. [2019-11-16 00:28:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:10,716 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-16 00:28:10,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-16 00:28:10,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-16 00:28:10,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:10,717 INFO L225 Difference]: With dead ends: 48 [2019-11-16 00:28:10,718 INFO L226 Difference]: Without dead ends: 44 [2019-11-16 00:28:10,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2019-11-16 00:28:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-16 00:28:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-16 00:28:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-16 00:28:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-16 00:28:10,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-16 00:28:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:10,725 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-16 00:28:10,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-16 00:28:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-16 00:28:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-16 00:28:10,726 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:10,726 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:10,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:10,927 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-16 00:28:10,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:10,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4054274] [2019-11-16 00:28:10,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:10,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:10,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-16 00:28:11,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4054274] [2019-11-16 00:28:11,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764354408] [2019-11-16 00:28:11,324 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:11,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-16 00:28:11,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:11,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-16 00:28:11,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-16 00:28:11,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:11,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2019-11-16 00:28:11,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780582851] [2019-11-16 00:28:11,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-16 00:28:11,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-16 00:28:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:28:11,442 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 19 states. [2019-11-16 00:28:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:11,645 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-16 00:28:11,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:28:11,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-16 00:28:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:11,647 INFO L225 Difference]: With dead ends: 51 [2019-11-16 00:28:11,647 INFO L226 Difference]: Without dead ends: 47 [2019-11-16 00:28:11,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2019-11-16 00:28:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-16 00:28:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-16 00:28:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-16 00:28:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-16 00:28:11,653 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-16 00:28:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:11,654 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-16 00:28:11,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-16 00:28:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-16 00:28:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-16 00:28:11,655 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:11,655 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:11,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:11,859 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-16 00:28:11,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:11,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813547452] [2019-11-16 00:28:11,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:11,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:11,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-16 00:28:12,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813547452] [2019-11-16 00:28:12,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508349058] [2019-11-16 00:28:12,307 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:12,381 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-16 00:28:12,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:12,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-16 00:28:12,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-16 00:28:12,430 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:12,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-11-16 00:28:12,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759473095] [2019-11-16 00:28:12,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-16 00:28:12,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-16 00:28:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:28:12,434 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2019-11-16 00:28:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:12,658 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-16 00:28:12,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-16 00:28:12,658 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2019-11-16 00:28:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:12,659 INFO L225 Difference]: With dead ends: 54 [2019-11-16 00:28:12,659 INFO L226 Difference]: Without dead ends: 50 [2019-11-16 00:28:12,660 INFO L600 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 [2019-11-16 00:28:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-16 00:28:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-16 00:28:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-16 00:28:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-16 00:28:12,670 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-16 00:28:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:12,671 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-16 00:28:12,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-16 00:28:12,671 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-16 00:28:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-16 00:28:12,672 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:12,672 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:12,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:12,873 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-16 00:28:12,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:12,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498209103] [2019-11-16 00:28:12,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:12,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:12,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-16 00:28:13,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498209103] [2019-11-16 00:28:13,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113643820] [2019-11-16 00:28:13,366 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-16 00:28:13,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-16 00:28:13,475 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:13,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-11-16 00:28:13,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976650665] [2019-11-16 00:28:13,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:28:13,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:28:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:28:13,479 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 21 states. [2019-11-16 00:28:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:13,719 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-16 00:28:13,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-16 00:28:13,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2019-11-16 00:28:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:13,720 INFO L225 Difference]: With dead ends: 57 [2019-11-16 00:28:13,720 INFO L226 Difference]: Without dead ends: 53 [2019-11-16 00:28:13,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=807, Unknown=0, NotChecked=0, Total=1190 [2019-11-16 00:28:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-16 00:28:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-16 00:28:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-16 00:28:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-16 00:28:13,729 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-16 00:28:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:13,730 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-16 00:28:13,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:28:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-16 00:28:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-16 00:28:13,731 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:13,731 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:13,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:13,931 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-16 00:28:13,932 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:13,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36617034] [2019-11-16 00:28:13,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:13,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:13,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-16 00:28:14,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36617034] [2019-11-16 00:28:14,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959114533] [2019-11-16 00:28:14,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:14,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:28:14,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:14,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-16 00:28:14,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-16 00:28:14,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:14,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 22 [2019-11-16 00:28:14,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418258256] [2019-11-16 00:28:14,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:28:14,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:28:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:28:14,602 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2019-11-16 00:28:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:14,887 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-16 00:28:14,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:28:14,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-16 00:28:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:14,889 INFO L225 Difference]: With dead ends: 60 [2019-11-16 00:28:14,889 INFO L226 Difference]: Without dead ends: 56 [2019-11-16 00:28:14,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2019-11-16 00:28:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-16 00:28:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-16 00:28:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-16 00:28:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-16 00:28:14,895 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-16 00:28:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:14,895 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-16 00:28:14,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:28:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-16 00:28:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-16 00:28:14,901 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:14,901 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:15,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:15,104 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-16 00:28:15,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:15,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86035471] [2019-11-16 00:28:15,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:15,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:15,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-16 00:28:15,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86035471] [2019-11-16 00:28:15,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498177188] [2019-11-16 00:28:15,703 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:15,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-16 00:28:15,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:15,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-16 00:28:15,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-16 00:28:15,844 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:15,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2019-11-16 00:28:15,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136159838] [2019-11-16 00:28:15,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-16 00:28:15,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-16 00:28:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:28:15,847 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2019-11-16 00:28:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:16,111 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-16 00:28:16,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:28:16,112 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-11-16 00:28:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:16,113 INFO L225 Difference]: With dead ends: 63 [2019-11-16 00:28:16,113 INFO L226 Difference]: Without dead ends: 59 [2019-11-16 00:28:16,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2019-11-16 00:28:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-16 00:28:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-16 00:28:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-16 00:28:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-16 00:28:16,122 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-16 00:28:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:16,123 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-16 00:28:16,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-16 00:28:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-16 00:28:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-16 00:28:16,125 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:16,125 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:16,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:16,329 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-16 00:28:16,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:16,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073002574] [2019-11-16 00:28:16,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:16,330 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:16,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-16 00:28:16,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073002574] [2019-11-16 00:28:16,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015991274] [2019-11-16 00:28:16,920 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:17,017 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:28:17,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:17,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-16 00:28:17,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-16 00:28:17,075 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:17,075 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2019-11-16 00:28:17,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721902831] [2019-11-16 00:28:17,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-16 00:28:17,076 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-16 00:28:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-11-16 00:28:17,077 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 24 states. [2019-11-16 00:28:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:17,371 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-16 00:28:17,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-16 00:28:17,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2019-11-16 00:28:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:17,372 INFO L225 Difference]: With dead ends: 66 [2019-11-16 00:28:17,373 INFO L226 Difference]: Without dead ends: 62 [2019-11-16 00:28:17,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2019-11-16 00:28:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-16 00:28:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-16 00:28:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-16 00:28:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-16 00:28:17,378 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-16 00:28:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:17,379 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-16 00:28:17,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-16 00:28:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-16 00:28:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-16 00:28:17,380 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:17,380 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:17,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:17,585 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-16 00:28:17,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:17,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729512143] [2019-11-16 00:28:17,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:17,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:17,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-16 00:28:18,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729512143] [2019-11-16 00:28:18,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248941955] [2019-11-16 00:28:18,251 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:18,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-16 00:28:18,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:18,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-16 00:28:18,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-16 00:28:18,381 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:18,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 25 [2019-11-16 00:28:18,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420503598] [2019-11-16 00:28:18,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-16 00:28:18,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-16 00:28:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:28:18,383 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 25 states. [2019-11-16 00:28:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:18,697 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-16 00:28:18,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-16 00:28:18,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2019-11-16 00:28:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:18,698 INFO L225 Difference]: With dead ends: 69 [2019-11-16 00:28:18,698 INFO L226 Difference]: Without dead ends: 65 [2019-11-16 00:28:18,699 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=1209, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:28:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-16 00:28:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-16 00:28:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-16 00:28:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-16 00:28:18,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-16 00:28:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:18,704 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-16 00:28:18,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-16 00:28:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-16 00:28:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-16 00:28:18,706 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:18,706 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:18,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:18,915 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-16 00:28:18,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:18,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887487257] [2019-11-16 00:28:18,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:18,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:18,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-16 00:28:19,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887487257] [2019-11-16 00:28:19,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474275031] [2019-11-16 00:28:19,676 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:19,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-16 00:28:19,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:28:19,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-16 00:28:19,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-16 00:28:19,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:19,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2019-11-16 00:28:19,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895699876] [2019-11-16 00:28:19,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-16 00:28:19,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-16 00:28:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-11-16 00:28:19,850 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 26 states. [2019-11-16 00:28:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:20,172 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-16 00:28:20,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:28:20,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-11-16 00:28:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:20,173 INFO L225 Difference]: With dead ends: 72 [2019-11-16 00:28:20,173 INFO L226 Difference]: Without dead ends: 68 [2019-11-16 00:28:20,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=658, Invalid=1322, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:28:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-16 00:28:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-16 00:28:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-16 00:28:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-16 00:28:20,178 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-16 00:28:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:20,179 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-16 00:28:20,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-16 00:28:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-16 00:28:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-16 00:28:20,180 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:20,180 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:20,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:20,390 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-16 00:28:20,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:20,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937434829] [2019-11-16 00:28:20,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:20,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:20,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-16 00:28:21,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937434829] [2019-11-16 00:28:21,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799243727] [2019-11-16 00:28:21,198 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/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 [2019-11-16 00:28:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:28:21,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-16 00:28:21,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:28:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-16 00:28:21,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:28:21,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 27 [2019-11-16 00:28:21,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379106504] [2019-11-16 00:28:21,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-16 00:28:21,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:28:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-16 00:28:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:28:21,324 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 27 states. [2019-11-16 00:28:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:28:21,621 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-16 00:28:21,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-16 00:28:21,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2019-11-16 00:28:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:28:21,622 INFO L225 Difference]: With dead ends: 75 [2019-11-16 00:28:21,622 INFO L226 Difference]: Without dead ends: 71 [2019-11-16 00:28:21,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=722, Invalid=1440, Unknown=0, NotChecked=0, Total=2162 [2019-11-16 00:28:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-16 00:28:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-16 00:28:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-16 00:28:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-16 00:28:21,627 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-16 00:28:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:28:21,628 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-16 00:28:21,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-16 00:28:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-16 00:28:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-16 00:28:21,629 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:28:21,629 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:28:21,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:28:21,832 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:28:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:28:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-16 00:28:21,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:28:21,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955411756] [2019-11-16 00:28:21,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:21,833 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:28:21,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:28:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:28:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:28:21,906 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:28:21,906 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:28:21,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:28:21 BoogieIcfgContainer [2019-11-16 00:28:21,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:28:21,964 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:28:21,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:28:21,964 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:28:21,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:28:03" (3/4) ... [2019-11-16 00:28:21,966 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:28:22,024 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_85f631e2-a625-4352-97e1-500ea40e0837/bin/uautomizer/witness.graphml [2019-11-16 00:28:22,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:28:22,026 INFO L168 Benchmark]: Toolchain (without parser) took 19245.69 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 363.9 MB). Free memory was 950.1 MB in the beginning and 953.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 360.6 MB. Max. memory is 11.5 GB. [2019-11-16 00:28:22,027 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:28:22,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -202.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:28:22,028 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:28:22,028 INFO L168 Benchmark]: Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:28:22,028 INFO L168 Benchmark]: RCFGBuilder took 179.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:28:22,029 INFO L168 Benchmark]: TraceAbstraction took 18661.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 205.0 MB). Free memory was 1.1 GB in the beginning and 966.3 MB in the end (delta: 169.0 MB). Peak memory consumption was 374.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:28:22,029 INFO L168 Benchmark]: Witness Printer took 60.24 ms. Allocated memory is still 1.4 GB. Free memory was 966.3 MB in the beginning and 953.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:28:22,032 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 295.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -202.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 179.06 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18661.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 205.0 MB). Free memory was 1.1 GB in the beginning and 966.3 MB in the end (delta: 169.0 MB). Peak memory consumption was 374.0 MB. Max. memory is 11.5 GB. * Witness Printer took 60.24 ms. Allocated memory is still 1.4 GB. Free memory was 966.3 MB in the beginning and 953.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 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: 18.6s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 162 SDtfs, 730 SDslu, 984 SDs, 0 SdLazy, 1203 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2212 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 6.6s 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: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.4s 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...