./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/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 f0223d224c23ad097829e98aea8e9aa733d97ed8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/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 f0223d224c23ad097829e98aea8e9aa733d97ed8 ........................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: 1 --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 00:04:20,066 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 00:04:20,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 00:04:20,075 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 00:04:20,076 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 00:04:20,076 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 00:04:20,077 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 00:04:20,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 00:04:20,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 00:04:20,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 00:04:20,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 00:04:20,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 00:04:20,081 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 00:04:20,082 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 00:04:20,083 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 00:04:20,083 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 00:04:20,084 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 00:04:20,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 00:04:20,086 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 00:04:20,087 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 00:04:20,088 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 00:04:20,089 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 00:04:20,090 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 00:04:20,091 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 00:04:20,091 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 00:04:20,091 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 00:04:20,092 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 00:04:20,093 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 00:04:20,093 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 00:04:20,094 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 00:04:20,094 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 00:04:20,095 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 00:04:20,095 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 00:04:20,095 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 00:04:20,096 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 00:04:20,096 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 00:04:20,096 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 00:04:20,106 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 00:04:20,107 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 00:04:20,107 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 00:04:20,107 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 00:04:20,108 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 00:04:20,108 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 00:04:20,108 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 00:04:20,108 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 00:04:20,108 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 00:04:20,109 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 00:04:20,110 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 00:04:20,110 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 00:04:20,110 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 00:04:20,110 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 00:04:20,110 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 00:04:20,110 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 00:04:20,111 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 00:04:20,111 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 00:04:20,111 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 00:04:20,111 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 00:04:20,111 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 00:04:20,111 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 00:04:20,112 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 00:04:20,112 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/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 -> f0223d224c23ad097829e98aea8e9aa733d97ed8 [2018-11-10 00:04:20,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 00:04:20,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 00:04:20,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 00:04:20,149 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 00:04:20,149 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 00:04:20,150 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c [2018-11-10 00:04:20,191 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/0ec16bf47/e084c4dd5f8e48a8af7bcc01882321e3/FLAG0b6df38d5 [2018-11-10 00:04:20,583 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 00:04:20,583 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c [2018-11-10 00:04:20,588 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/0ec16bf47/e084c4dd5f8e48a8af7bcc01882321e3/FLAG0b6df38d5 [2018-11-10 00:04:20,597 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/0ec16bf47/e084c4dd5f8e48a8af7bcc01882321e3 [2018-11-10 00:04:20,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 00:04:20,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 00:04:20,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 00:04:20,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 00:04:20,604 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 00:04:20,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769b41f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20, skipping insertion in model container [2018-11-10 00:04:20,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 00:04:20,631 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 00:04:20,737 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 00:04:20,740 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 00:04:20,754 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 00:04:20,765 INFO L193 MainTranslator]: Completed translation [2018-11-10 00:04:20,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20 WrapperNode [2018-11-10 00:04:20,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 00:04:20,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 00:04:20,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 00:04:20,766 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 00:04:20,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... [2018-11-10 00:04:20,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 00:04:20,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 00:04:20,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 00:04:20,788 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 00:04:20,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/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 [2018-11-10 00:04:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 00:04:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 00:04:20,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 00:04:20,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-10 00:04:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-10 00:04:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-10 00:04:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 00:04:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 00:04:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-11-10 00:04:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-10 00:04:21,019 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 00:04:21,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:04:21 BoogieIcfgContainer [2018-11-10 00:04:21,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 00:04:21,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 00:04:21,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 00:04:21,022 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 00:04:21,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:04:20" (1/3) ... [2018-11-10 00:04:21,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799a93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:04:21, skipping insertion in model container [2018-11-10 00:04:21,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:04:20" (2/3) ... [2018-11-10 00:04:21,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799a93b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:04:21, skipping insertion in model container [2018-11-10 00:04:21,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:04:21" (3/3) ... [2018-11-10 00:04:21,025 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum3_true-unreach-call.c [2018-11-10 00:04:21,034 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 00:04:21,040 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 00:04:21,050 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 00:04:21,068 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 00:04:21,068 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 00:04:21,068 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 00:04:21,068 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 00:04:21,069 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 00:04:21,069 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 00:04:21,069 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 00:04:21,069 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 00:04:21,069 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 00:04:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-11-10 00:04:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-10 00:04:21,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:21,084 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:21,086 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:21,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1039423537, now seen corresponding path program 1 times [2018-11-10 00:04:21,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:21,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:21,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:21,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 00:04:21,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 00:04:21,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 00:04:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 00:04:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 00:04:21,193 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 2 states. [2018-11-10 00:04:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:21,212 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2018-11-10 00:04:21,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 00:04:21,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-11-10 00:04:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:21,218 INFO L225 Difference]: With dead ends: 102 [2018-11-10 00:04:21,218 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 00:04:21,220 INFO L605 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 [2018-11-10 00:04:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 00:04:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-10 00:04:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 00:04:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-11-10 00:04:21,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2018-11-10 00:04:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:21,244 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-11-10 00:04:21,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 00:04:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-11-10 00:04:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-10 00:04:21,245 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:21,246 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:21,246 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:21,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 684944072, now seen corresponding path program 1 times [2018-11-10 00:04:21,246 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:21,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:21,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:21,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 00:04:21,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 00:04:21,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 00:04:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 00:04:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 00:04:21,326 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2018-11-10 00:04:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:21,396 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2018-11-10 00:04:21,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 00:04:21,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-11-10 00:04:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:21,397 INFO L225 Difference]: With dead ends: 83 [2018-11-10 00:04:21,397 INFO L226 Difference]: Without dead ends: 78 [2018-11-10 00:04:21,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 00:04:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-10 00:04:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2018-11-10 00:04:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 00:04:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2018-11-10 00:04:21,405 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 30 [2018-11-10 00:04:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:21,405 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2018-11-10 00:04:21,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 00:04:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2018-11-10 00:04:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-10 00:04:21,406 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:21,407 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:21,407 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:21,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 877040266, now seen corresponding path program 1 times [2018-11-10 00:04:21,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:21,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 00:04:21,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 00:04:21,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-10 00:04:21,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 00:04:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 00:04:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 00:04:21,470 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 4 states. [2018-11-10 00:04:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:21,575 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2018-11-10 00:04:21,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 00:04:21,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-11-10 00:04:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:21,576 INFO L225 Difference]: With dead ends: 128 [2018-11-10 00:04:21,577 INFO L226 Difference]: Without dead ends: 79 [2018-11-10 00:04:21,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 00:04:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-10 00:04:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2018-11-10 00:04:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-10 00:04:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2018-11-10 00:04:21,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 35 [2018-11-10 00:04:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:21,584 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2018-11-10 00:04:21,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 00:04:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2018-11-10 00:04:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-10 00:04:21,585 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:21,585 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:21,585 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:21,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2097361903, now seen corresponding path program 1 times [2018-11-10 00:04:21,586 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:21,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:21,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 00:04:21,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:21,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:21,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:21,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 00:04:21,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:21,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-11-10 00:04:21,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 00:04:21,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 00:04:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-11-10 00:04:21,775 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 7 states. [2018-11-10 00:04:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:21,895 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2018-11-10 00:04:21,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 00:04:21,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2018-11-10 00:04:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:21,896 INFO L225 Difference]: With dead ends: 154 [2018-11-10 00:04:21,896 INFO L226 Difference]: Without dead ends: 109 [2018-11-10 00:04:21,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-11-10 00:04:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-10 00:04:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2018-11-10 00:04:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-10 00:04:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2018-11-10 00:04:21,904 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 60 [2018-11-10 00:04:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:21,904 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2018-11-10 00:04:21,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 00:04:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2018-11-10 00:04:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-10 00:04:21,905 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:21,905 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:21,906 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:21,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1398441816, now seen corresponding path program 2 times [2018-11-10 00:04:21,906 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:21,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:21,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:21,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:24,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:24,546 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:24,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 00:04:24,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 00:04:24,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:24,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:25,231 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-11-10 00:04:25,233 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-11-10 00:04:25,233 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:04:25,234 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:25,235 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:25,235 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2018-11-10 00:04:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:25,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:25,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 26] total 75 [2018-11-10 00:04:25,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-10 00:04:25,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-10 00:04:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=4968, Unknown=0, NotChecked=0, Total=5550 [2018-11-10 00:04:25,336 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 75 states. [2018-11-10 00:04:25,985 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2018-11-10 00:04:27,288 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2018-11-10 00:04:28,004 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2018-11-10 00:04:28,467 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2018-11-10 00:04:29,614 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2018-11-10 00:04:30,244 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2018-11-10 00:04:30,921 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2018-11-10 00:04:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:31,043 INFO L93 Difference]: Finished difference Result 243 states and 259 transitions. [2018-11-10 00:04:31,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-10 00:04:31,044 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 90 [2018-11-10 00:04:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:31,044 INFO L225 Difference]: With dead ends: 243 [2018-11-10 00:04:31,045 INFO L226 Difference]: Without dead ends: 238 [2018-11-10 00:04:31,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6294 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2523, Invalid=15299, Unknown=0, NotChecked=0, Total=17822 [2018-11-10 00:04:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-10 00:04:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 164. [2018-11-10 00:04:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-11-10 00:04:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2018-11-10 00:04:31,061 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 90 [2018-11-10 00:04:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:31,062 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2018-11-10 00:04:31,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-10 00:04:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2018-11-10 00:04:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-10 00:04:31,064 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:31,064 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:31,064 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:31,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash -252563286, now seen corresponding path program 3 times [2018-11-10 00:04:31,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:31,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:31,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:04:31,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-10 00:04:31,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:31,164 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:31,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 00:04:31,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 00:04:31,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:31,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-10 00:04:31,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:31,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-11-10 00:04:31,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 00:04:31,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 00:04:31,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-10 00:04:31,265 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand 13 states. [2018-11-10 00:04:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:31,433 INFO L93 Difference]: Finished difference Result 380 states and 407 transitions. [2018-11-10 00:04:31,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 00:04:31,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 95 [2018-11-10 00:04:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:31,435 INFO L225 Difference]: With dead ends: 380 [2018-11-10 00:04:31,436 INFO L226 Difference]: Without dead ends: 215 [2018-11-10 00:04:31,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-11-10 00:04:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-11-10 00:04:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2018-11-10 00:04:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-11-10 00:04:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 196 transitions. [2018-11-10 00:04:31,454 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 196 transitions. Word has length 95 [2018-11-10 00:04:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:31,454 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 196 transitions. [2018-11-10 00:04:31,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 00:04:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 196 transitions. [2018-11-10 00:04:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-10 00:04:31,457 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:31,457 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:31,457 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:31,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1947609813, now seen corresponding path program 4 times [2018-11-10 00:04:31,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:31,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:31,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:04:31,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-10 00:04:31,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:31,531 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:31,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 00:04:31,565 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 00:04:31,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:31,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-11-10 00:04:31,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:31,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-11-10 00:04:31,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 00:04:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 00:04:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-11-10 00:04:31,635 INFO L87 Difference]: Start difference. First operand 186 states and 196 transitions. Second operand 13 states. [2018-11-10 00:04:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:31,841 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2018-11-10 00:04:31,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 00:04:31,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 100 [2018-11-10 00:04:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:31,842 INFO L225 Difference]: With dead ends: 211 [2018-11-10 00:04:31,842 INFO L226 Difference]: Without dead ends: 154 [2018-11-10 00:04:31,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2018-11-10 00:04:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-10 00:04:31,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2018-11-10 00:04:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-10 00:04:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2018-11-10 00:04:31,853 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 100 [2018-11-10 00:04:31,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:31,853 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2018-11-10 00:04:31,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 00:04:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2018-11-10 00:04:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-10 00:04:31,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:31,854 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:31,855 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:31,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2085227471, now seen corresponding path program 5 times [2018-11-10 00:04:31,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:31,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:04:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:35,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:35,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:35,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 00:04:35,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-10 00:04:35,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:35,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:37,468 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2018-11-10 00:04:37,475 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:04:37,476 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:04:37,481 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:04:37,481 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:04:37,486 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 37 [2018-11-10 00:04:37,486 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:04:37,491 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:37,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:37,494 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:7 [2018-11-10 00:04:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:37,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:37,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 36] total 87 [2018-11-10 00:04:37,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-11-10 00:04:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-11-10 00:04:37,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=7092, Unknown=0, NotChecked=0, Total=7482 [2018-11-10 00:04:37,648 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 87 states. [2018-11-10 00:04:38,842 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 110 [2018-11-10 00:04:40,609 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2018-11-10 00:04:41,001 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2018-11-10 00:04:42,180 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2018-11-10 00:04:43,775 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2018-11-10 00:04:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:47,973 INFO L93 Difference]: Finished difference Result 304 states and 324 transitions. [2018-11-10 00:04:47,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-10 00:04:47,974 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 120 [2018-11-10 00:04:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:47,975 INFO L225 Difference]: With dead ends: 304 [2018-11-10 00:04:47,975 INFO L226 Difference]: Without dead ends: 298 [2018-11-10 00:04:47,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 78 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7522 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3059, Invalid=21433, Unknown=0, NotChecked=0, Total=24492 [2018-11-10 00:04:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-11-10 00:04:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2018-11-10 00:04:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-11-10 00:04:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 272 transitions. [2018-11-10 00:04:47,990 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 272 transitions. Word has length 120 [2018-11-10 00:04:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:47,990 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 272 transitions. [2018-11-10 00:04:47,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-11-10 00:04:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 272 transitions. [2018-11-10 00:04:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-10 00:04:47,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:47,992 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:47,992 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:47,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 125813008, now seen corresponding path program 6 times [2018-11-10 00:04:47,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:47,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:47,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:47,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:04:47,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-10 00:04:48,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:48,081 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:48,087 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 00:04:48,108 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-10 00:04:48,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:48,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-10 00:04:48,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:48,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-11-10 00:04:48,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 00:04:48,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 00:04:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2018-11-10 00:04:48,180 INFO L87 Difference]: Start difference. First operand 254 states and 272 transitions. Second operand 16 states. [2018-11-10 00:04:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:48,542 INFO L93 Difference]: Finished difference Result 539 states and 574 transitions. [2018-11-10 00:04:48,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 00:04:48,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 125 [2018-11-10 00:04:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:48,543 INFO L225 Difference]: With dead ends: 539 [2018-11-10 00:04:48,543 INFO L226 Difference]: Without dead ends: 390 [2018-11-10 00:04:48,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2018-11-10 00:04:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2018-11-10 00:04:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 328. [2018-11-10 00:04:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-11-10 00:04:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 346 transitions. [2018-11-10 00:04:48,560 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 346 transitions. Word has length 125 [2018-11-10 00:04:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:48,560 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 346 transitions. [2018-11-10 00:04:48,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 00:04:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 346 transitions. [2018-11-10 00:04:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-10 00:04:48,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:48,562 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:48,562 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:48,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1315711169, now seen corresponding path program 7 times [2018-11-10 00:04:48,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:48,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:48,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:48,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:04:48,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-10 00:04:48,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:48,662 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:48,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:48,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-10 00:04:48,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:48,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-11-10 00:04:48,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 00:04:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 00:04:48,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2018-11-10 00:04:48,787 INFO L87 Difference]: Start difference. First operand 328 states and 346 transitions. Second operand 17 states. [2018-11-10 00:04:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:04:49,032 INFO L93 Difference]: Finished difference Result 466 states and 488 transitions. [2018-11-10 00:04:49,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 00:04:49,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2018-11-10 00:04:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:04:49,033 INFO L225 Difference]: With dead ends: 466 [2018-11-10 00:04:49,033 INFO L226 Difference]: Without dead ends: 169 [2018-11-10 00:04:49,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2018-11-10 00:04:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-10 00:04:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 151. [2018-11-10 00:04:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-10 00:04:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2018-11-10 00:04:49,044 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 135 [2018-11-10 00:04:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:04:49,044 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2018-11-10 00:04:49,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 00:04:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2018-11-10 00:04:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-10 00:04:49,045 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:04:49,045 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:04:49,046 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:04:49,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:04:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -155976056, now seen corresponding path program 8 times [2018-11-10 00:04:49,046 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:04:49,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:04:49,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:49,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:04:49,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:04:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:04:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:54,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:04:54,302 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:04:54,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 00:04:54,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 00:04:54,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:04:54,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:04:57,768 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2018-11-10 00:04:57,769 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:04:57,770 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:04:57,770 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:04:57,771 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:04:57,771 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:04:57,771 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:04:57,779 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 66 [2018-11-10 00:04:57,779 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:04:57,785 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:57,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:04:57,789 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:92, output treesize:7 [2018-11-10 00:04:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:04:58,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:04:58,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 46] total 117 [2018-11-10 00:04:58,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-11-10 00:04:58,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-11-10 00:04:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=13021, Unknown=0, NotChecked=0, Total=13572 [2018-11-10 00:04:58,022 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 117 states. [2018-11-10 00:05:00,078 WARN L179 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 150 [2018-11-10 00:05:01,197 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2018-11-10 00:05:01,745 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 41 [2018-11-10 00:05:03,424 WARN L179 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 140 [2018-11-10 00:05:04,057 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2018-11-10 00:05:04,674 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2018-11-10 00:05:05,787 WARN L179 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 141 [2018-11-10 00:05:07,863 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 33 [2018-11-10 00:05:09,189 WARN L179 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 140 [2018-11-10 00:05:09,838 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2018-11-10 00:05:12,431 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2018-11-10 00:05:14,476 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2018-11-10 00:05:15,442 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 41 [2018-11-10 00:05:16,511 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 96 [2018-11-10 00:05:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:16,865 INFO L93 Difference]: Finished difference Result 384 states and 409 transitions. [2018-11-10 00:05:16,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-11-10 00:05:16,865 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 150 [2018-11-10 00:05:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:16,866 INFO L225 Difference]: With dead ends: 384 [2018-11-10 00:05:16,867 INFO L226 Difference]: Without dead ends: 378 [2018-11-10 00:05:16,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 95 SyntacticMatches, 34 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13445 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=5244, Invalid=38646, Unknown=0, NotChecked=0, Total=43890 [2018-11-10 00:05:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2018-11-10 00:05:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 329. [2018-11-10 00:05:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-11-10 00:05:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 351 transitions. [2018-11-10 00:05:16,891 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 351 transitions. Word has length 150 [2018-11-10 00:05:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:16,891 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 351 transitions. [2018-11-10 00:05:16,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-11-10 00:05:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 351 transitions. [2018-11-10 00:05:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-11-10 00:05:16,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:16,892 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:16,892 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:16,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 722942759, now seen corresponding path program 9 times [2018-11-10 00:05:16,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:16,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:16,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:05:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-11-10 00:05:17,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:05:17,003 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:05:17,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 00:05:17,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 00:05:17,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:05:17,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:05:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-11-10 00:05:17,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:05:17,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-11-10 00:05:17,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 00:05:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 00:05:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2018-11-10 00:05:17,097 INFO L87 Difference]: Start difference. First operand 329 states and 351 transitions. Second operand 19 states. [2018-11-10 00:05:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:17,475 INFO L93 Difference]: Finished difference Result 684 states and 725 transitions. [2018-11-10 00:05:17,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 00:05:17,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 155 [2018-11-10 00:05:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:17,476 INFO L225 Difference]: With dead ends: 684 [2018-11-10 00:05:17,476 INFO L226 Difference]: Without dead ends: 490 [2018-11-10 00:05:17,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2018-11-10 00:05:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2018-11-10 00:05:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 418. [2018-11-10 00:05:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2018-11-10 00:05:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 440 transitions. [2018-11-10 00:05:17,495 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 440 transitions. Word has length 155 [2018-11-10 00:05:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:17,496 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 440 transitions. [2018-11-10 00:05:17,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 00:05:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 440 transitions. [2018-11-10 00:05:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-10 00:05:17,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:17,497 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:17,497 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:17,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1142104328, now seen corresponding path program 10 times [2018-11-10 00:05:17,497 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:17,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:17,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:17,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:05:17,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 109 proven. 55 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-11-10 00:05:17,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:05:17,589 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:05:17,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 00:05:17,650 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 00:05:17,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:05:17,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:05:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 126 proven. 38 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-11-10 00:05:17,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:05:17,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-11-10 00:05:17,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 00:05:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 00:05:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2018-11-10 00:05:17,898 INFO L87 Difference]: Start difference. First operand 418 states and 440 transitions. Second operand 19 states. [2018-11-10 00:05:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:18,346 INFO L93 Difference]: Finished difference Result 581 states and 607 transitions. [2018-11-10 00:05:18,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 00:05:18,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 170 [2018-11-10 00:05:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:18,348 INFO L225 Difference]: With dead ends: 581 [2018-11-10 00:05:18,348 INFO L226 Difference]: Without dead ends: 199 [2018-11-10 00:05:18,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2018-11-10 00:05:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-10 00:05:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 181. [2018-11-10 00:05:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-10 00:05:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2018-11-10 00:05:18,364 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 170 [2018-11-10 00:05:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:18,364 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2018-11-10 00:05:18,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 00:05:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2018-11-10 00:05:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-10 00:05:18,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:18,365 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:18,365 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:18,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -374234031, now seen corresponding path program 11 times [2018-11-10 00:05:18,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:18,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:18,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:18,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:05:18,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:05:24,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:05:24,993 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:05:24,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 00:05:25,030 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 00:05:25,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:05:25,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:05:28,928 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 84 [2018-11-10 00:05:28,930 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,931 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,931 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,932 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,932 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:05:28,933 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,933 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,934 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,934 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,935 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:05:28,935 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,936 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,936 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:05:28,937 INFO L700 Elim1Store]: detected not equals via solver [2018-11-10 00:05:28,937 INFO L682 Elim1Store]: detected equality via solver [2018-11-10 00:05:28,951 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 139 [2018-11-10 00:05:28,952 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:05:28,963 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:05:28,966 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:05:28,966 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:120, output treesize:7 [2018-11-10 00:05:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:05:29,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:05:29,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 56] total 131 [2018-11-10 00:05:29,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-11-10 00:05:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-11-10 00:05:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1530, Invalid=15500, Unknown=0, NotChecked=0, Total=17030 [2018-11-10 00:05:29,217 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand 131 states. [2018-11-10 00:05:31,785 WARN L179 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 158 [2018-11-10 00:05:35,000 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 156 [2018-11-10 00:05:35,259 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2018-11-10 00:05:35,788 WARN L179 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 159 [2018-11-10 00:05:36,042 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 107 [2018-11-10 00:05:36,336 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 111 [2018-11-10 00:05:37,260 WARN L179 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 141 [2018-11-10 00:05:38,889 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 32 [2018-11-10 00:05:40,453 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 150 [2018-11-10 00:05:40,723 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2018-11-10 00:05:41,006 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2018-11-10 00:05:41,303 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 119 [2018-11-10 00:05:41,536 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2018-11-10 00:05:44,399 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 111 [2018-11-10 00:05:45,603 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 39 [2018-11-10 00:05:46,394 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 112 [2018-11-10 00:05:48,463 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 123 [2018-11-10 00:05:48,693 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2018-11-10 00:05:49,249 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2018-11-10 00:05:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:50,338 INFO L93 Difference]: Finished difference Result 418 states and 439 transitions. [2018-11-10 00:05:50,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-11-10 00:05:50,338 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 180 [2018-11-10 00:05:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:50,340 INFO L225 Difference]: With dead ends: 418 [2018-11-10 00:05:50,340 INFO L226 Difference]: Without dead ends: 411 [2018-11-10 00:05:50,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 108 SyntacticMatches, 52 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21997 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=6397, Invalid=48125, Unknown=0, NotChecked=0, Total=54522 [2018-11-10 00:05:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-11-10 00:05:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 359. [2018-11-10 00:05:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-11-10 00:05:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 376 transitions. [2018-11-10 00:05:50,368 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 376 transitions. Word has length 180 [2018-11-10 00:05:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:50,369 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 376 transitions. [2018-11-10 00:05:50,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-11-10 00:05:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 376 transitions. [2018-11-10 00:05:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-10 00:05:50,370 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:50,370 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:50,370 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:50,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:50,371 INFO L82 PathProgramCache]: Analyzing trace with hash 441991344, now seen corresponding path program 12 times [2018-11-10 00:05:50,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:50,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:50,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:50,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:05:50,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 38 proven. 109 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-10 00:05:50,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:05:50,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:05:50,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 00:05:50,529 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 00:05:50,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:05:50,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:05:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 60 proven. 87 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-10 00:05:50,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:05:50,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-11-10 00:05:50,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 00:05:50,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 00:05:50,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2018-11-10 00:05:50,621 INFO L87 Difference]: Start difference. First operand 359 states and 376 transitions. Second operand 22 states. [2018-11-10 00:05:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:51,305 INFO L93 Difference]: Finished difference Result 754 states and 786 transitions. [2018-11-10 00:05:51,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 00:05:51,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 185 [2018-11-10 00:05:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:51,306 INFO L225 Difference]: With dead ends: 754 [2018-11-10 00:05:51,306 INFO L226 Difference]: Without dead ends: 545 [2018-11-10 00:05:51,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 00:05:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-11-10 00:05:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 463. [2018-11-10 00:05:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2018-11-10 00:05:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 480 transitions. [2018-11-10 00:05:51,331 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 480 transitions. Word has length 185 [2018-11-10 00:05:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:51,332 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 480 transitions. [2018-11-10 00:05:51,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 00:05:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 480 transitions. [2018-11-10 00:05:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-10 00:05:51,333 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:51,333 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:51,333 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:51,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1645508289, now seen corresponding path program 13 times [2018-11-10 00:05:51,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:51,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:51,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:51,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:05:51,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 92 proven. 82 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-10 00:05:51,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:05:51,424 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:05:51,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:05:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:05:51,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:05:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 114 proven. 60 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-10 00:05:51,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:05:51,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-11-10 00:05:51,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 00:05:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 00:05:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-11-10 00:05:51,577 INFO L87 Difference]: Start difference. First operand 463 states and 480 transitions. Second operand 22 states. [2018-11-10 00:05:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:05:51,867 INFO L93 Difference]: Finished difference Result 651 states and 672 transitions. [2018-11-10 00:05:51,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 00:05:51,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2018-11-10 00:05:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:05:51,868 INFO L225 Difference]: With dead ends: 651 [2018-11-10 00:05:51,868 INFO L226 Difference]: Without dead ends: 229 [2018-11-10 00:05:51,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2018-11-10 00:05:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-11-10 00:05:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 211. [2018-11-10 00:05:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-10 00:05:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 216 transitions. [2018-11-10 00:05:51,880 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 216 transitions. Word has length 195 [2018-11-10 00:05:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:05:51,880 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 216 transitions. [2018-11-10 00:05:51,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 00:05:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 216 transitions. [2018-11-10 00:05:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-10 00:05:51,881 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:05:51,881 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:05:51,882 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:05:51,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:05:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1193477016, now seen corresponding path program 14 times [2018-11-10 00:05:51,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:05:51,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:05:51,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:51,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:05:51,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:05:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:06:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:06:01,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:06:01,513 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:06:01,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 00:06:01,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 00:06:01,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:06:01,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:06:05,528 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2018-11-10 00:06:05,529 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2018-11-10 00:06:05,529 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:06:05,538 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:06:05,540 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:06:05,540 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2018-11-10 00:06:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:06:05,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:06:05,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 66] total 163 [2018-11-10 00:06:05,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-11-10 00:06:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-11-10 00:06:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2245, Invalid=24161, Unknown=0, NotChecked=0, Total=26406 [2018-11-10 00:06:05,829 INFO L87 Difference]: Start difference. First operand 211 states and 216 transitions. Second operand 163 states. [2018-11-10 00:06:09,604 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 205 DAG size of output: 193 [2018-11-10 00:06:10,721 WARN L179 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2018-11-10 00:06:12,922 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 31 [2018-11-10 00:06:13,188 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 35 [2018-11-10 00:06:13,689 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 25 [2018-11-10 00:06:13,959 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 27 [2018-11-10 00:06:15,027 WARN L179 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 192 [2018-11-10 00:06:15,358 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2018-11-10 00:06:16,474 WARN L179 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 192 [2018-11-10 00:06:16,848 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 136 [2018-11-10 00:06:17,257 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2018-11-10 00:06:18,560 WARN L179 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 181 [2018-11-10 00:06:20,309 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 47 [2018-11-10 00:06:20,824 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 37 [2018-11-10 00:06:21,115 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 41 [2018-11-10 00:06:21,385 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 58 [2018-11-10 00:06:21,666 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 41 [2018-11-10 00:06:21,955 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 46 [2018-11-10 00:06:23,041 WARN L179 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 187 [2018-11-10 00:06:23,410 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 120 [2018-11-10 00:06:23,800 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 122 [2018-11-10 00:06:24,227 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 135 [2018-11-10 00:06:24,525 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2018-11-10 00:06:28,122 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 35 [2018-11-10 00:06:28,485 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 32 [2018-11-10 00:06:29,072 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 149 [2018-11-10 00:06:32,758 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 58 [2018-11-10 00:06:33,141 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 48 [2018-11-10 00:06:33,702 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 124 [2018-11-10 00:06:35,313 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 35 [2018-11-10 00:06:35,656 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 28 [2018-11-10 00:06:36,445 WARN L179 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 161 [2018-11-10 00:06:36,832 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2018-11-10 00:06:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:06:37,274 INFO L93 Difference]: Finished difference Result 494 states and 521 transitions. [2018-11-10 00:06:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-11-10 00:06:37,274 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 210 [2018-11-10 00:06:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:06:37,275 INFO L225 Difference]: With dead ends: 494 [2018-11-10 00:06:37,275 INFO L226 Difference]: Without dead ends: 488 [2018-11-10 00:06:37,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 126 SyntacticMatches, 51 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34030 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=10229, Invalid=73581, Unknown=0, NotChecked=0, Total=83810 [2018-11-10 00:06:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2018-11-10 00:06:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 439. [2018-11-10 00:06:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-11-10 00:06:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 461 transitions. [2018-11-10 00:06:37,302 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 461 transitions. Word has length 210 [2018-11-10 00:06:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:06:37,302 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 461 transitions. [2018-11-10 00:06:37,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-11-10 00:06:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 461 transitions. [2018-11-10 00:06:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-10 00:06:37,304 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:06:37,304 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:06:37,304 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:06:37,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:06:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1600972935, now seen corresponding path program 15 times [2018-11-10 00:06:37,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:06:37,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:06:37,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:37,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:06:37,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:06:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 60 proven. 146 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-10 00:06:37,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:06:37,474 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:06:37,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 00:06:37,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-10 00:06:37,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:06:37,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:06:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 87 proven. 119 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-10 00:06:37,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:06:37,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-11-10 00:06:37,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 00:06:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 00:06:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2018-11-10 00:06:37,649 INFO L87 Difference]: Start difference. First operand 439 states and 461 transitions. Second operand 25 states. [2018-11-10 00:06:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:06:38,399 INFO L93 Difference]: Finished difference Result 914 states and 955 transitions. [2018-11-10 00:06:38,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 00:06:38,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 215 [2018-11-10 00:06:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:06:38,400 INFO L225 Difference]: With dead ends: 914 [2018-11-10 00:06:38,400 INFO L226 Difference]: Without dead ends: 650 [2018-11-10 00:06:38,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2018-11-10 00:06:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2018-11-10 00:06:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 558. [2018-11-10 00:06:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2018-11-10 00:06:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 580 transitions. [2018-11-10 00:06:38,446 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 580 transitions. Word has length 215 [2018-11-10 00:06:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:06:38,446 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 580 transitions. [2018-11-10 00:06:38,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 00:06:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 580 transitions. [2018-11-10 00:06:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-10 00:06:38,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:06:38,448 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:06:38,448 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:06:38,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:06:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 77651338, now seen corresponding path program 16 times [2018-11-10 00:06:38,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:06:38,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:06:38,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:38,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:06:38,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:06:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 124 proven. 114 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-10 00:06:38,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:06:38,595 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:06:38,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 00:06:38,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 00:06:38,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:06:38,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:06:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 151 proven. 87 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-10 00:06:38,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:06:38,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-11-10 00:06:38,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 00:06:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 00:06:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2018-11-10 00:06:38,808 INFO L87 Difference]: Start difference. First operand 558 states and 580 transitions. Second operand 25 states. [2018-11-10 00:06:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:06:39,211 INFO L93 Difference]: Finished difference Result 771 states and 797 transitions. [2018-11-10 00:06:39,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 00:06:39,212 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 225 [2018-11-10 00:06:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:06:39,213 INFO L225 Difference]: With dead ends: 771 [2018-11-10 00:06:39,213 INFO L226 Difference]: Without dead ends: 259 [2018-11-10 00:06:39,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2018-11-10 00:06:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-11-10 00:06:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2018-11-10 00:06:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-10 00:06:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 246 transitions. [2018-11-10 00:06:39,229 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 246 transitions. Word has length 225 [2018-11-10 00:06:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:06:39,229 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 246 transitions. [2018-11-10 00:06:39,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 00:06:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 246 transitions. [2018-11-10 00:06:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-10 00:06:39,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:06:39,231 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:06:39,231 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:06:39,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:06:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1315840911, now seen corresponding path program 17 times [2018-11-10 00:06:39,231 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:06:39,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:06:39,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:39,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:06:39,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:06:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:06:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:06:52,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:06:52,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:06:52,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 00:06:52,704 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-10 00:06:52,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:06:52,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:06:59,075 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2018-11-10 00:06:59,076 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2018-11-10 00:06:59,076 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-10 00:06:59,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:06:59,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-10 00:06:59,080 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2018-11-10 00:06:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 00:06:59,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:06:59,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 76] total 191 [2018-11-10 00:06:59,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 191 states [2018-11-10 00:06:59,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2018-11-10 00:06:59,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3033, Invalid=33257, Unknown=0, NotChecked=0, Total=36290 [2018-11-10 00:06:59,520 INFO L87 Difference]: Start difference. First operand 241 states and 246 transitions. Second operand 191 states. [2018-11-10 00:07:04,315 WARN L179 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 241 DAG size of output: 226 [2018-11-10 00:07:05,862 WARN L179 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 201 [2018-11-10 00:07:07,919 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 30 [2018-11-10 00:07:08,177 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 36 [2018-11-10 00:07:08,422 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 45 [2018-11-10 00:07:08,724 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 32 [2018-11-10 00:07:09,035 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 36 [2018-11-10 00:07:09,319 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 36 [2018-11-10 00:07:09,693 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 24 [2018-11-10 00:07:10,038 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 29 [2018-11-10 00:07:11,472 WARN L179 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 242 DAG size of output: 225 [2018-11-10 00:07:11,918 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 144 [2018-11-10 00:07:13,404 WARN L179 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 240 DAG size of output: 227 [2018-11-10 00:07:13,867 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 152 [2018-11-10 00:07:14,373 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 159 [2018-11-10 00:07:14,745 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 115 [2018-11-10 00:07:14,996 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2018-11-10 00:07:16,415 WARN L179 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2018-11-10 00:07:17,067 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2018-11-10 00:07:20,826 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 36 [2018-11-10 00:07:21,457 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 44 [2018-11-10 00:07:21,714 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 38 [2018-11-10 00:07:22,060 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 42 [2018-11-10 00:07:22,610 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 45 [2018-11-10 00:07:22,935 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 48 [2018-11-10 00:07:23,415 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 47 [2018-11-10 00:07:23,794 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 54 [2018-11-10 00:07:25,266 WARN L179 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 256 DAG size of output: 218 [2018-11-10 00:07:25,733 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 145 [2018-11-10 00:07:26,215 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 141 [2018-11-10 00:07:26,720 WARN L179 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 145 [2018-11-10 00:07:28,564 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 36 [2018-11-10 00:07:28,953 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 32 [2018-11-10 00:07:29,375 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 26 [2018-11-10 00:07:30,061 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 155 [2018-11-10 00:07:31,703 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 40 [2018-11-10 00:07:32,127 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 46 [2018-11-10 00:07:32,583 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 54 [2018-11-10 00:07:33,338 WARN L179 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 157 [2018-11-10 00:07:33,628 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2018-11-10 00:07:33,886 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2018-11-10 00:07:34,612 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 108 [2018-11-10 00:07:35,878 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2018-11-10 00:07:38,281 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 36 [2018-11-10 00:07:38,936 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 36 [2018-11-10 00:07:39,366 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 27 [2018-11-10 00:07:40,360 WARN L179 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 187 [2018-11-10 00:07:40,815 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2018-11-10 00:07:41,072 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2018-11-10 00:07:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:07:41,552 INFO L93 Difference]: Finished difference Result 572 states and 602 transitions. [2018-11-10 00:07:41,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-11-10 00:07:41,553 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 240 [2018-11-10 00:07:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:07:41,554 INFO L225 Difference]: With dead ends: 572 [2018-11-10 00:07:41,554 INFO L226 Difference]: Without dead ends: 566 [2018-11-10 00:07:41,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 140 SyntacticMatches, 57 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45906 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=14069, Invalid=101191, Unknown=0, NotChecked=0, Total=115260 [2018-11-10 00:07:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2018-11-10 00:07:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 504. [2018-11-10 00:07:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2018-11-10 00:07:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 528 transitions. [2018-11-10 00:07:41,590 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 528 transitions. Word has length 240 [2018-11-10 00:07:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:07:41,590 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 528 transitions. [2018-11-10 00:07:41,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 191 states. [2018-11-10 00:07:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 528 transitions. [2018-11-10 00:07:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-10 00:07:41,592 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:07:41,592 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:07:41,592 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:07:41,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:07:41,592 INFO L82 PathProgramCache]: Analyzing trace with hash -726857648, now seen corresponding path program 18 times [2018-11-10 00:07:41,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:07:41,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:07:41,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:41,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:07:41,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:07:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 87 proven. 188 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2018-11-10 00:07:41,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:07:41,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:07:41,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 00:07:41,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-10 00:07:41,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 00:07:41,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:07:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 119 proven. 156 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2018-11-10 00:07:41,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:07:41,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-11-10 00:07:41,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 00:07:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 00:07:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2018-11-10 00:07:41,931 INFO L87 Difference]: Start difference. First operand 504 states and 528 transitions. Second operand 28 states. [2018-11-10 00:07:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:07:42,946 INFO L93 Difference]: Finished difference Result 1044 states and 1088 transitions. [2018-11-10 00:07:42,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-10 00:07:42,946 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2018-11-10 00:07:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:07:42,948 INFO L225 Difference]: With dead ends: 1044 [2018-11-10 00:07:42,948 INFO L226 Difference]: Without dead ends: 740 [2018-11-10 00:07:42,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 00:07:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2018-11-10 00:07:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 638. [2018-11-10 00:07:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2018-11-10 00:07:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 662 transitions. [2018-11-10 00:07:43,019 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 662 transitions. Word has length 245 [2018-11-10 00:07:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:07:43,020 INFO L481 AbstractCegarLoop]: Abstraction has 638 states and 662 transitions. [2018-11-10 00:07:43,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 00:07:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 662 transitions. [2018-11-10 00:07:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-10 00:07:43,021 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:07:43,022 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:07:43,022 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:07:43,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:07:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash 502038222, now seen corresponding path program 19 times [2018-11-10 00:07:43,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:07:43,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:07:43,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:43,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 00:07:43,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:07:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 124 proven. 151 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2018-11-10 00:07:43,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 00:07:43,209 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 00:07:43,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:07:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:07:43,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 00:07:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 193 proven. 119 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-11-10 00:07:43,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 00:07:43,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-11-10 00:07:43,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 00:07:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 00:07:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2018-11-10 00:07:43,409 INFO L87 Difference]: Start difference. First operand 638 states and 662 transitions. Second operand 28 states. [2018-11-10 00:07:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 00:07:43,854 INFO L93 Difference]: Finished difference Result 876 states and 904 transitions. [2018-11-10 00:07:43,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 00:07:43,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 260 [2018-11-10 00:07:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 00:07:43,855 INFO L225 Difference]: With dead ends: 876 [2018-11-10 00:07:43,855 INFO L226 Difference]: Without dead ends: 289 [2018-11-10 00:07:43,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 00:07:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-11-10 00:07:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2018-11-10 00:07:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-10 00:07:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 276 transitions. [2018-11-10 00:07:43,875 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 276 transitions. Word has length 260 [2018-11-10 00:07:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 00:07:43,875 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 276 transitions. [2018-11-10 00:07:43,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 00:07:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 276 transitions. [2018-11-10 00:07:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-11-10 00:07:43,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 00:07:43,877 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 00:07:43,877 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 00:07:43,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 00:07:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1333890488, now seen corresponding path program 20 times [2018-11-10 00:07:43,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 00:07:43,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 00:07:43,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:43,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 00:07:43,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 00:07:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 00:07:44,505 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) at de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createCCEquality(EqualityProxy.java:112) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.mbtc(LinArSolve.java:2067) at de.uni_freiburg.informatik.ultimate.smtinterpol.theory.linar.LinArSolve.computeConflictClause(LinArSolve.java:618) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.checkConsistency(DPLLEngine.java:1027) at de.uni_freiburg.informatik.ultimate.smtinterpol.dpll.DPLLEngine.solve(DPLLEngine.java:1171) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol$CheckType$1.check(SMTInterpol.java:114) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSatAssuming(SMTInterpol.java:502) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.checkSat(SMTInterpol.java:455) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:974) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-10 00:07:44,508 INFO L168 Benchmark]: Toolchain (without parser) took 203908.26 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 228.1 MB). Free memory was 954.8 MB in the beginning and 1.1 GB in the end (delta: -157.6 MB). Peak memory consumption was 460.0 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:44,509 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 00:07:44,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.76 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:44,509 INFO L168 Benchmark]: Boogie Preprocessor took 21.82 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 941.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:44,509 INFO L168 Benchmark]: RCFGBuilder took 231.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:44,510 INFO L168 Benchmark]: TraceAbstraction took 203487.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 94.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.6 MB). Peak memory consumption was 482.3 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:44,512 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.76 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.82 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 941.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 231.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 203487.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 94.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.6 MB). Peak memory consumption was 482.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.smtinterpol.convert.EqualityProxy.createLAEquality(EqualityProxy.java:91) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 00:07:45,911 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 00:07:45,912 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 00:07:45,920 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 00:07:45,921 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 00:07:45,921 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 00:07:45,922 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 00:07:45,923 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 00:07:45,924 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 00:07:45,925 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 00:07:45,925 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 00:07:45,926 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 00:07:45,926 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 00:07:45,927 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 00:07:45,928 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 00:07:45,928 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 00:07:45,929 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 00:07:45,930 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 00:07:45,932 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 00:07:45,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 00:07:45,933 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 00:07:45,934 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 00:07:45,936 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 00:07:45,936 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 00:07:45,937 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 00:07:45,937 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 00:07:45,938 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 00:07:45,938 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 00:07:45,939 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 00:07:45,940 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 00:07:45,940 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 00:07:45,941 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 00:07:45,941 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 00:07:45,941 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 00:07:45,942 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 00:07:45,942 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 00:07:45,942 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-11-10 00:07:45,953 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 00:07:45,953 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 00:07:45,953 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 00:07:45,954 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 00:07:45,954 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 00:07:45,954 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 00:07:45,954 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 00:07:45,954 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 00:07:45,955 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 00:07:45,955 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 00:07:45,955 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 00:07:45,955 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 00:07:45,956 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 00:07:45,956 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 00:07:45,956 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 00:07:45,956 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 00:07:45,957 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 00:07:45,957 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 00:07:45,958 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 00:07:45,958 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 00:07:45,959 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/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 -> f0223d224c23ad097829e98aea8e9aa733d97ed8 [2018-11-10 00:07:45,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 00:07:45,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 00:07:46,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 00:07:46,003 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 00:07:46,003 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 00:07:46,004 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/../../sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c [2018-11-10 00:07:46,048 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/d4d322084/c63084c47a4c4b8aa0c4b92284f1cd72/FLAG48b65323d [2018-11-10 00:07:46,439 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 00:07:46,441 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/sv-benchmarks/c/array-crafted/zero_sum3_true-unreach-call.c [2018-11-10 00:07:46,445 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/d4d322084/c63084c47a4c4b8aa0c4b92284f1cd72/FLAG48b65323d [2018-11-10 00:07:46,452 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_18e38b50-25ab-4b94-a6dd-483eee06be9f/bin-2019/uautomizer/data/d4d322084/c63084c47a4c4b8aa0c4b92284f1cd72 [2018-11-10 00:07:46,454 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 00:07:46,455 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 00:07:46,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 00:07:46,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 00:07:46,458 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 00:07:46,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:07:46" (1/1) ... [2018-11-10 00:07:46,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e9df37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:07:46, skipping insertion in model container [2018-11-10 00:07:46,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:07:46" (1/1) ... [2018-11-10 00:07:46,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 00:07:46,481 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 00:07:46,608 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 00:07:46,610 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 00:07:46,619 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: 1 at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValueBitvector(TypeSizes.java:465) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:340) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:335) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.extractSizeTValue(TypeSizeAndOffsetComputer.java:317) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.constructSizeTValue_Array(TypeSizeAndOffsetComputer.java:229) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.computeSize(TypeSizeAndOffsetComputer.java:200) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizeAndOffsetComputer.constructBytesizeExpression(TypeSizeAndOffsetComputer.java:120) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.MemoryHandler.calculateSizeOf(MemoryHandler.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.MemoryHandler.getMallocCall(MemoryHandler.java:514) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleIASTDeclarator(CHandler.java:2686) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1876) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:279) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1011) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:318) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1519) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:330) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:960) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:332) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:364) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1371) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:287) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3316) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2119) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:537) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainDispatcher.dispatch(MainDispatcher.java:268) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.performMainRun(MainTranslator.java:228) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:191) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:117) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:129) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-10 00:07:46,622 INFO L168 Benchmark]: Toolchain (without parser) took 167.22 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 931.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:46,623 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 00:07:46,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.73 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 931.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-11-10 00:07:46,625 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 165.73 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 931.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: 1 de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: ArrayIndexOutOfBoundsException: 1: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValueBitvector(TypeSizes.java:465) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...