./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/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 45294379b83c6b60e0b0199955cdf7244f057430 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-10-22 09:01:41,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:41,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:41,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:41,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:41,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:41,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:41,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:41,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:41,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:41,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:41,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:41,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:41,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:41,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:41,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:41,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:41,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:41,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:41,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:41,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:41,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:41,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:41,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:41,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:41,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:41,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:41,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:41,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:41,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:41,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:41,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:41,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:41,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:41,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:41,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:41,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:41,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:41,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:41,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:41,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:41,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:41,091 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:41,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:41,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:41,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:41,093 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:41,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:41,093 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:41,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:41,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:41,094 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:41,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:41,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:41,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:41,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:41,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:41,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:41,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:41,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-10-22 09:01:41,130 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:41,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:41,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:41,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:41,147 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:41,147 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2019-10-22 09:01:41,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/data/39b181e47/b8a8f09631434417834ca7cd0928fca2/FLAGa6c339ede [2019-10-22 09:01:41,573 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:41,574 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/sv-benchmarks/c/ldv-regression/test24-2.c [2019-10-22 09:01:41,579 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/data/39b181e47/b8a8f09631434417834ca7cd0928fca2/FLAGa6c339ede [2019-10-22 09:01:41,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/data/39b181e47/b8a8f09631434417834ca7cd0928fca2 [2019-10-22 09:01:41,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:41,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:41,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:41,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:41,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:41,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6a536c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41, skipping insertion in model container [2019-10-22 09:01:41,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,609 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:41,622 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:41,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:41,890 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:41,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:41,923 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:41,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41 WrapperNode [2019-10-22 09:01:41,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:41,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:41,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:41,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:41,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:41,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:41,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:41,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:41,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... [2019-10-22 09:01:41,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:41,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:41,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:41,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:41,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:42,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:01:42,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:42,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:42,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 09:01:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:01:42,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:01:42,298 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:42,298 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 09:01:42,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:42 BoogieIcfgContainer [2019-10-22 09:01:42,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:42,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:42,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:42,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:42,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:41" (1/3) ... [2019-10-22 09:01:42,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e18ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:42, skipping insertion in model container [2019-10-22 09:01:42,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:41" (2/3) ... [2019-10-22 09:01:42,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e18ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:42, skipping insertion in model container [2019-10-22 09:01:42,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:42" (3/3) ... [2019-10-22 09:01:42,310 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-10-22 09:01:42,319 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:42,324 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:42,335 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:42,360 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:42,360 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:42,361 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:42,361 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:42,361 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:42,361 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:42,361 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:42,361 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-22 09:01:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:01:42,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:42,383 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-10-22 09:01:42,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889247855] [2019-10-22 09:01:42,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:42,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889247855] [2019-10-22 09:01:42,488 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:42,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:01:42,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869627964] [2019-10-22 09:01:42,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 09:01:42,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 09:01:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:42,501 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-10-22 09:01:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:42,512 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-10-22 09:01:42,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 09:01:42,513 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-22 09:01:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:42,521 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:01:42,521 INFO L226 Difference]: Without dead ends: 13 [2019-10-22 09:01:42,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 09:01:42,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-22 09:01:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-22 09:01:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-22 09:01:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-22 09:01:42,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-22 09:01:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:42,549 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-22 09:01:42,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 09:01:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-22 09:01:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 09:01:42,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:42,550 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,550 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-10-22 09:01:42,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363845760] [2019-10-22 09:01:42,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:42,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363845760] [2019-10-22 09:01:42,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:42,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:01:42,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084759226] [2019-10-22 09:01:42,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:01:42,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:01:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:01:42,602 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-10-22 09:01:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:42,614 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-10-22 09:01:42,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:01:42,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-22 09:01:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:42,615 INFO L225 Difference]: With dead ends: 24 [2019-10-22 09:01:42,615 INFO L226 Difference]: Without dead ends: 15 [2019-10-22 09:01:42,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:01:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-22 09:01:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-22 09:01:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:01:42,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-22 09:01:42,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-10-22 09:01:42,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:42,619 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-22 09:01:42,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:01:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-22 09:01:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 09:01:42,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:42,620 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,620 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-10-22 09:01:42,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27376329] [2019-10-22 09:01:42,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:42,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27376329] [2019-10-22 09:01:42,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918588658] [2019-10-22 09:01:42,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:42,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 09:01:42,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:42,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:42,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-22 09:01:42,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106954066] [2019-10-22 09:01:42,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:42,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:42,759 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-10-22 09:01:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:42,778 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-10-22 09:01:42,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:01:42,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-22 09:01:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:42,779 INFO L225 Difference]: With dead ends: 26 [2019-10-22 09:01:42,779 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 09:01:42,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 09:01:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-10-22 09:01:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 09:01:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-22 09:01:42,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-10-22 09:01:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:42,783 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-22 09:01:42,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-22 09:01:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:01:42,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:42,783 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:42,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:42,985 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:42,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:42,985 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-10-22 09:01:42,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:42,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534566514] [2019-10-22 09:01:42,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:42,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534566514] [2019-10-22 09:01:43,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310360042] [2019-10-22 09:01:43,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:43,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:43,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:43,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:01:43,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:43,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-22 09:01:43,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810535918] [2019-10-22 09:01:43,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:43,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:43,115 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-10-22 09:01:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:43,135 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-10-22 09:01:43,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:01:43,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-22 09:01:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:43,136 INFO L225 Difference]: With dead ends: 28 [2019-10-22 09:01:43,136 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 09:01:43,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 09:01:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-10-22 09:01:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-22 09:01:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-22 09:01:43,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-10-22 09:01:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:43,139 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-22 09:01:43,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-22 09:01:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 09:01:43,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:43,140 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:43,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:43,341 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:43,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-10-22 09:01:43,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:43,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753549166] [2019-10-22 09:01:43,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:43,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:43,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753549166] [2019-10-22 09:01:43,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791596363] [2019-10-22 09:01:43,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:43,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:01:43,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:43,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:43,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,487 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:43,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-22 09:01:43,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277969913] [2019-10-22 09:01:43,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:01:43,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:43,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:01:43,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:43,488 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-10-22 09:01:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:43,520 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-22 09:01:43,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:43,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-22 09:01:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:43,521 INFO L225 Difference]: With dead ends: 30 [2019-10-22 09:01:43,521 INFO L226 Difference]: Without dead ends: 21 [2019-10-22 09:01:43,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-22 09:01:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-22 09:01:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 09:01:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-22 09:01:43,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-10-22 09:01:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:43,525 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-22 09:01:43,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:01:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-22 09:01:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:43,526 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:43,526 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:43,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:43,727 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:43,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-10-22 09:01:43,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:43,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328915112] [2019-10-22 09:01:43,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:43,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:43,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328915112] [2019-10-22 09:01:43,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329837699] [2019-10-22 09:01:43,815 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:43,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:43,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:43,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:43,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:43,868 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:43,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-22 09:01:43,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498594407] [2019-10-22 09:01:43,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:01:43,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:01:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:43,870 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-10-22 09:01:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:43,899 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-22 09:01:43,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:43,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-10-22 09:01:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:43,901 INFO L225 Difference]: With dead ends: 32 [2019-10-22 09:01:43,901 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 09:01:43,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 09:01:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-10-22 09:01:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:01:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-22 09:01:43,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-10-22 09:01:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:43,905 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-22 09:01:43,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:01:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-22 09:01:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 09:01:43,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:43,906 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:44,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:44,107 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-10-22 09:01:44,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:44,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244921689] [2019-10-22 09:01:44,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:44,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244921689] [2019-10-22 09:01:44,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102639928] [2019-10-22 09:01:44,209 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:44,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:01:44,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:44,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:44,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:44,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:44,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-22 09:01:44,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033881844] [2019-10-22 09:01:44,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:44,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:44,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:44,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:44,279 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-10-22 09:01:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:44,319 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-22 09:01:44,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:44,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-10-22 09:01:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:44,321 INFO L225 Difference]: With dead ends: 34 [2019-10-22 09:01:44,321 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 09:01:44,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 09:01:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-22 09:01:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 09:01:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-22 09:01:44,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-10-22 09:01:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:44,328 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-22 09:01:44,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-22 09:01:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:01:44,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:44,328 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:44,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:44,530 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-10-22 09:01:44,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:44,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90824966] [2019-10-22 09:01:44,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:44,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90824966] [2019-10-22 09:01:44,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141550531] [2019-10-22 09:01:44,613 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:44,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 09:01:44,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:44,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:01:44,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:44,715 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:44,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-22 09:01:44,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627305890] [2019-10-22 09:01:44,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:44,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:44,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:44,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:44,717 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-10-22 09:01:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:44,757 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-22 09:01:44,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:01:44,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-22 09:01:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:44,758 INFO L225 Difference]: With dead ends: 36 [2019-10-22 09:01:44,759 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 09:01:44,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 09:01:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-22 09:01:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:01:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-22 09:01:44,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-10-22 09:01:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:44,763 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-22 09:01:44,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-22 09:01:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:01:44,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:44,764 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:44,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:44,965 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-10-22 09:01:44,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:44,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341241480] [2019-10-22 09:01:44,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:44,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341241480] [2019-10-22 09:01:45,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744786663] [2019-10-22 09:01:45,073 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:45,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:45,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:45,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-22 09:01:45,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934927116] [2019-10-22 09:01:45,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:45,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:45,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:45,134 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-10-22 09:01:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:45,184 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-10-22 09:01:45,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:45,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-10-22 09:01:45,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:45,186 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:01:45,186 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 09:01:45,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 09:01:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-22 09:01:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 09:01:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-10-22 09:01:45,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-10-22 09:01:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:45,190 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-10-22 09:01:45,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-10-22 09:01:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:01:45,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:45,191 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:45,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:45,394 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-10-22 09:01:45,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:45,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452310682] [2019-10-22 09:01:45,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:45,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:45,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452310682] [2019-10-22 09:01:45,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895047054] [2019-10-22 09:01:45,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:45,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:45,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:45,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:45,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,581 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:45,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-22 09:01:45,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165896297] [2019-10-22 09:01:45,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:45,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:45,583 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-10-22 09:01:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:45,633 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-10-22 09:01:45,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:01:45,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-22 09:01:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:45,634 INFO L225 Difference]: With dead ends: 40 [2019-10-22 09:01:45,635 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 09:01:45,635 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 09:01:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-22 09:01:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-22 09:01:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-10-22 09:01:45,638 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-10-22 09:01:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:45,638 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-10-22 09:01:45,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-10-22 09:01:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 09:01:45,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:45,639 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:45,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:45,847 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-10-22 09:01:45,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:45,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464327100] [2019-10-22 09:01:45,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:45,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:45,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:45,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464327100] [2019-10-22 09:01:45,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774623239] [2019-10-22 09:01:45,960 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:46,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-22 09:01:46,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:46,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:01:46,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,167 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:46,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-22 09:01:46,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485121680] [2019-10-22 09:01:46,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:46,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:46,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:46,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:46,173 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-10-22 09:01:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:46,234 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-10-22 09:01:46,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:46,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-10-22 09:01:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:46,237 INFO L225 Difference]: With dead ends: 42 [2019-10-22 09:01:46,237 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 09:01:46,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 09:01:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-22 09:01:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 09:01:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-22 09:01:46,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-10-22 09:01:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:46,243 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-22 09:01:46,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-22 09:01:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 09:01:46,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:46,244 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:46,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:46,445 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-10-22 09:01:46,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:46,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559233994] [2019-10-22 09:01:46,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:46,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:46,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559233994] [2019-10-22 09:01:46,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618167925] [2019-10-22 09:01:46,556 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:46,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:46,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:46,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:01:46,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,611 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:46,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-22 09:01:46,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171595058] [2019-10-22 09:01:46,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:01:46,611 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:01:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:46,612 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-10-22 09:01:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:46,659 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-10-22 09:01:46,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:46,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-10-22 09:01:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:46,660 INFO L225 Difference]: With dead ends: 44 [2019-10-22 09:01:46,660 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:01:46,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:01:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-22 09:01:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 09:01:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-22 09:01:46,664 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-10-22 09:01:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:46,665 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-22 09:01:46,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:01:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-22 09:01:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:01:46,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:46,665 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:46,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:46,866 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:46,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-10-22 09:01:46,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:46,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205958093] [2019-10-22 09:01:46,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:46,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:46,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:46,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205958093] [2019-10-22 09:01:46,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122780942] [2019-10-22 09:01:46,978 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:47,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-22 09:01:47,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:47,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:01:47,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:47,218 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:47,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 09:01:47,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308441787] [2019-10-22 09:01:47,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:01:47,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:01:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:47,219 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-10-22 09:01:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:47,257 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-10-22 09:01:47,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:01:47,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-10-22 09:01:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:47,258 INFO L225 Difference]: With dead ends: 46 [2019-10-22 09:01:47,258 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 09:01:47,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 09:01:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-22 09:01:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 09:01:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-22 09:01:47,262 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-10-22 09:01:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:47,262 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-22 09:01:47,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:01:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-22 09:01:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 09:01:47,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:47,263 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:47,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:47,463 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-10-22 09:01:47,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:47,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841303732] [2019-10-22 09:01:47,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:47,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:47,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:47,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841303732] [2019-10-22 09:01:47,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726530389] [2019-10-22 09:01:47,604 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:48,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-22 09:01:48,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:48,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:01:48,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:48,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:48,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-10-22 09:01:48,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837464985] [2019-10-22 09:01:48,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 09:01:48,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 09:01:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:01:48,357 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-10-22 09:01:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:48,399 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-10-22 09:01:48,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:01:48,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-10-22 09:01:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:48,401 INFO L225 Difference]: With dead ends: 48 [2019-10-22 09:01:48,401 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 09:01:48,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:01:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 09:01:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-22 09:01:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 09:01:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-22 09:01:48,404 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-10-22 09:01:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:48,405 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-22 09:01:48,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 09:01:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-22 09:01:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:01:48,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:48,406 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:48,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:48,606 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-10-22 09:01:48,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:48,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233555529] [2019-10-22 09:01:48,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:48,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:48,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:48,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233555529] [2019-10-22 09:01:48,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52197619] [2019-10-22 09:01:48,745 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:48,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:01:48,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:48,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:48,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-22 09:01:48,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786735119] [2019-10-22 09:01:48,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:48,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:48,813 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-10-22 09:01:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:48,858 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-10-22 09:01:48,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:01:48,859 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-10-22 09:01:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:48,859 INFO L225 Difference]: With dead ends: 50 [2019-10-22 09:01:48,859 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 09:01:48,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 09:01:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-22 09:01:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 09:01:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-10-22 09:01:48,862 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-10-22 09:01:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:48,863 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-10-22 09:01:48,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-10-22 09:01:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 09:01:48,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:48,863 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:49,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:49,066 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:49,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-10-22 09:01:49,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:49,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263851569] [2019-10-22 09:01:49,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:49,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:49,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:49,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263851569] [2019-10-22 09:01:49,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540484636] [2019-10-22 09:01:49,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:49,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:49,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:49,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:49,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:49,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:49,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-22 09:01:49,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423653359] [2019-10-22 09:01:49,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:01:49,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:01:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:49,308 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-10-22 09:01:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:49,358 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-10-22 09:01:49,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 09:01:49,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-10-22 09:01:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:49,359 INFO L225 Difference]: With dead ends: 52 [2019-10-22 09:01:49,359 INFO L226 Difference]: Without dead ends: 43 [2019-10-22 09:01:49,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-22 09:01:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-22 09:01:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:01:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-22 09:01:49,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-10-22 09:01:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:49,363 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-22 09:01:49,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:01:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-22 09:01:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:01:49,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:49,364 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:49,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:49,565 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-10-22 09:01:49,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:49,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340018535] [2019-10-22 09:01:49,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:49,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:49,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:49,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340018535] [2019-10-22 09:01:49,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573190848] [2019-10-22 09:01:49,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:50,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-22 09:01:50,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:50,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:01:50,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:51,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:51,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-22 09:01:51,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009651557] [2019-10-22 09:01:51,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 09:01:51,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:51,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 09:01:51,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:51,012 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-10-22 09:01:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:51,061 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-10-22 09:01:51,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:01:51,061 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-10-22 09:01:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:51,062 INFO L225 Difference]: With dead ends: 54 [2019-10-22 09:01:51,062 INFO L226 Difference]: Without dead ends: 45 [2019-10-22 09:01:51,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-22 09:01:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-22 09:01:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 09:01:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-22 09:01:51,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-10-22 09:01:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:51,066 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-22 09:01:51,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 09:01:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-22 09:01:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-22 09:01:51,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:51,066 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:51,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:51,267 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:51,267 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-10-22 09:01:51,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:51,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805420740] [2019-10-22 09:01:51,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:51,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:51,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:51,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805420740] [2019-10-22 09:01:51,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368710999] [2019-10-22 09:01:51,432 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:51,468 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:51,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:51,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:01:51,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:51,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:51,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-22 09:01:51,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620729103] [2019-10-22 09:01:51,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:01:51,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:01:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:01:51,496 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-10-22 09:01:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:51,547 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-10-22 09:01:51,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:01:51,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-10-22 09:01:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:51,548 INFO L225 Difference]: With dead ends: 56 [2019-10-22 09:01:51,548 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 09:01:51,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:01:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 09:01:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-22 09:01:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-22 09:01:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-22 09:01:51,552 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-10-22 09:01:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:51,552 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-22 09:01:51,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:01:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-22 09:01:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:01:51,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:51,553 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:51,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:51,754 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-10-22 09:01:51,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:51,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69682971] [2019-10-22 09:01:51,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:51,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:51,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:51,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69682971] [2019-10-22 09:01:51,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363393096] [2019-10-22 09:01:51,922 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:52,776 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-22 09:01:52,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:52,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:01:52,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:52,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:52,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-22 09:01:52,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412250318] [2019-10-22 09:01:52,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:01:52,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:01:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:52,798 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-10-22 09:01:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:52,856 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-10-22 09:01:52,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:01:52,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-10-22 09:01:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:52,858 INFO L225 Difference]: With dead ends: 58 [2019-10-22 09:01:52,858 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 09:01:52,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 09:01:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-22 09:01:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 09:01:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-22 09:01:52,861 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-10-22 09:01:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:52,861 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-22 09:01:52,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:01:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-22 09:01:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-22 09:01:52,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:52,862 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:53,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:53,063 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-10-22 09:01:53,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:53,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082984950] [2019-10-22 09:01:53,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:53,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:53,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:53,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082984950] [2019-10-22 09:01:53,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922045213] [2019-10-22 09:01:53,257 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:58,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-22 09:01:58,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:58,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:01:58,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:58,841 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:58,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-22 09:01:58,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498039197] [2019-10-22 09:01:58,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:01:58,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:58,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:01:58,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:01:58,843 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-10-22 09:01:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:58,887 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-10-22 09:01:58,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:01:58,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-10-22 09:01:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:58,888 INFO L225 Difference]: With dead ends: 60 [2019-10-22 09:01:58,888 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 09:01:58,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:01:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 09:01:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-22 09:01:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 09:01:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-22 09:01:58,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-10-22 09:01:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:58,892 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-22 09:01:58,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:01:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-22 09:01:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-22 09:01:58,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:58,893 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:59,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:59,093 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-10-22 09:01:59,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:59,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246290657] [2019-10-22 09:01:59,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:59,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:59,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:59,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246290657] [2019-10-22 09:01:59,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388541671] [2019-10-22 09:01:59,292 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:59,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 09:01:59,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:59,360 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:59,360 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-22 09:01:59,360 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973561776] [2019-10-22 09:01:59,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:01:59,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:59,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:01:59,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:59,362 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-10-22 09:01:59,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:59,418 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-10-22 09:01:59,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:01:59,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-10-22 09:01:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:59,419 INFO L225 Difference]: With dead ends: 61 [2019-10-22 09:01:59,419 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 09:01:59,420 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 09:01:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-22 09:01:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 09:01:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-10-22 09:01:59,422 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-10-22 09:01:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:59,423 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-10-22 09:01:59,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:01:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-10-22 09:01:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:01:59,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:59,423 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:59,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:59,628 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:59,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-10-22 09:01:59,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:59,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075304410] [2019-10-22 09:01:59,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:59,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:59,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:59,778 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:59,779 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:01:59,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:59 BoogieIcfgContainer [2019-10-22 09:01:59,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:59,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:59,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:59,826 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:59,826 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:42" (3/4) ... [2019-10-22 09:01:59,828 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:01:59,883 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f55f567a-47bb-4d48-88e5-9462eea46e5d/bin/uautomizer/witness.graphml [2019-10-22 09:01:59,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:59,885 INFO L168 Benchmark]: Toolchain (without parser) took 18288.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -65.9 MB). Peak memory consumption was 120.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:59,885 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:59,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:59,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:59,886 INFO L168 Benchmark]: Boogie Preprocessor took 22.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:59,886 INFO L168 Benchmark]: RCFGBuilder took 318.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:59,887 INFO L168 Benchmark]: TraceAbstraction took 17521.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 102.9 MB). Peak memory consumption was 139.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:59,887 INFO L168 Benchmark]: Witness Printer took 57.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:59,889 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 318.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17521.60 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 102.9 MB). Peak memory consumption was 139.1 MB. Max. memory is 11.5 GB. * Witness Printer took 57.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 17.4s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 9.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2641 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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...