./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a071cc6090a217f48ed180b566a651717a8e39 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a071cc6090a217f48ed180b566a651717a8e39 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 13:21:35,586 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 13:21:35,588 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 13:21:35,594 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 13:21:35,595 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 13:21:35,595 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 13:21:35,596 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 13:21:35,597 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 13:21:35,598 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 13:21:35,599 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 13:21:35,600 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 13:21:35,600 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 13:21:35,601 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 13:21:35,601 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 13:21:35,602 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 13:21:35,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 13:21:35,603 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 13:21:35,605 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 13:21:35,606 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 13:21:35,607 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 13:21:35,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 13:21:35,609 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 13:21:35,610 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 13:21:35,610 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 13:21:35,610 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 13:21:35,611 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 13:21:35,612 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 13:21:35,612 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 13:21:35,613 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 13:21:35,614 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 13:21:35,614 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 13:21:35,614 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 13:21:35,614 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 13:21:35,615 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 13:21:35,615 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 13:21:35,616 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 13:21:35,616 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 13:21:35,626 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 13:21:35,626 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 13:21:35,627 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 13:21:35,627 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 13:21:35,627 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 13:21:35,628 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 13:21:35,628 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 13:21:35,629 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 13:21:35,629 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 13:21:35,629 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 13:21:35,629 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 13:21:35,630 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 13:21:35,631 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 13:21:35,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 13:21:35,632 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 13:21:35,632 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 13:21:35,633 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan 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 -> Taipan 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 -> d2a071cc6090a217f48ed180b566a651717a8e39 [2018-12-02 13:21:35,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 13:21:35,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 13:21:35,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 13:21:35,665 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 13:21:35,665 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 13:21:35,665 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:35,700 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f382b4fe5/70e17b20e81c455b90c1790dde6cb870/FLAG38787431b [2018-12-02 13:21:36,078 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 13:21:36,079 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:36,082 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f382b4fe5/70e17b20e81c455b90c1790dde6cb870/FLAG38787431b [2018-12-02 13:21:36,090 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f382b4fe5/70e17b20e81c455b90c1790dde6cb870 [2018-12-02 13:21:36,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 13:21:36,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 13:21:36,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 13:21:36,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 13:21:36,095 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 13:21:36,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@643eada2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36, skipping insertion in model container [2018-12-02 13:21:36,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 13:21:36,109 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 13:21:36,193 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:21:36,195 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 13:21:36,204 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:21:36,212 INFO L195 MainTranslator]: Completed translation [2018-12-02 13:21:36,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36 WrapperNode [2018-12-02 13:21:36,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 13:21:36,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 13:21:36,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 13:21:36,213 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 13:21:36,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 13:21:36,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 13:21:36,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 13:21:36,225 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 13:21:36,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... [2018-12-02 13:21:36,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 13:21:36,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 13:21:36,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 13:21:36,266 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 13:21:36,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 13:21:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 13:21:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 13:21:36,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 13:21:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 13:21:36,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 13:21:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 13:21:36,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 13:21:36,382 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 13:21:36,382 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 13:21:36,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:36 BoogieIcfgContainer [2018-12-02 13:21:36,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 13:21:36,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 13:21:36,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 13:21:36,385 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 13:21:36,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:21:36" (1/3) ... [2018-12-02 13:21:36,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bafea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:36, skipping insertion in model container [2018-12-02 13:21:36,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:36" (2/3) ... [2018-12-02 13:21:36,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bafea58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:36, skipping insertion in model container [2018-12-02 13:21:36,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:36" (3/3) ... [2018-12-02 13:21:36,387 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:36,394 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 13:21:36,398 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 13:21:36,412 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 13:21:36,436 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 13:21:36,436 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 13:21:36,436 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 13:21:36,436 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 13:21:36,436 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 13:21:36,436 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 13:21:36,437 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 13:21:36,437 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 13:21:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-02 13:21:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 13:21:36,451 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:36,452 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:36,453 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:36,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:36,458 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-02 13:21:36,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:36,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:36,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:21:36,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 13:21:36,528 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 13:21:36,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 13:21:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 13:21:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 13:21:36,540 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-02 13:21:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:36,552 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-02 13:21:36,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 13:21:36,553 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 13:21:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:36,558 INFO L225 Difference]: With dead ends: 32 [2018-12-02 13:21:36,558 INFO L226 Difference]: Without dead ends: 13 [2018-12-02 13:21:36,560 INFO L631 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 [2018-12-02 13:21:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-02 13:21:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-02 13:21:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-02 13:21:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-02 13:21:36,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-02 13:21:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:36,582 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-02 13:21:36,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 13:21:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-02 13:21:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 13:21:36,582 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:36,582 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:36,582 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:36,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2018-12-02 13:21:36,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:36,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:36,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,584 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:21:36,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 13:21:36,626 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 13:21:36,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 13:21:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 13:21:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 13:21:36,627 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-12-02 13:21:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:36,635 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-02 13:21:36,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 13:21:36,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 13:21:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:36,636 INFO L225 Difference]: With dead ends: 21 [2018-12-02 13:21:36,636 INFO L226 Difference]: Without dead ends: 16 [2018-12-02 13:21:36,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 13:21:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-02 13:21:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-02 13:21:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-02 13:21:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-02 13:21:36,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-02 13:21:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:36,639 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-02 13:21:36,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 13:21:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-02 13:21:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 13:21:36,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:36,640 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:36,640 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:36,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:36,640 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2018-12-02 13:21:36,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:36,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:36,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,641 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:36,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:36,678 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-02 13:21:36,679 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [16], [20], [27], [30], [32], [38], [39], [40], [42] [2018-12-02 13:21:36,698 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 13:21:36,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 13:21:36,789 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 13:21:36,790 INFO L272 AbstractInterpreter]: Visited 13 different actions 25 times. Merged at 3 different actions 9 times. Never widened. Performed 71 root evaluator evaluations with a maximum evaluation depth of 5. Performed 71 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 2 fixpoints after 2 different actions. Largest state had 5 variables. [2018-12-02 13:21:36,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:36,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 13:21:36,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:36,799 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:36,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:36,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 13:21:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:36,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:36,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-02 13:21:36,875 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:36,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 13:21:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 13:21:36,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-02 13:21:36,876 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-12-02 13:21:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:36,896 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-02 13:21:36,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 13:21:36,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-02 13:21:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:36,897 INFO L225 Difference]: With dead ends: 24 [2018-12-02 13:21:36,897 INFO L226 Difference]: Without dead ends: 19 [2018-12-02 13:21:36,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-02 13:21:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-02 13:21:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-02 13:21:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-02 13:21:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-12-02 13:21:36,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-12-02 13:21:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:36,901 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-12-02 13:21:36,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 13:21:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-12-02 13:21:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-02 13:21:36,902 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:36,902 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:36,902 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:36,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2018-12-02 13:21:36,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:36,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:36,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:36,903 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:36,950 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:36,950 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:36,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:36,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:36,950 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:36,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 13:21:36,958 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 13:21:36,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 13:21:36,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:36,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:36,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:37,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-02 13:21:37,035 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:37,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 13:21:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 13:21:37,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-02 13:21:37,035 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2018-12-02 13:21:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:37,057 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-12-02 13:21:37,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 13:21:37,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-12-02 13:21:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:37,058 INFO L225 Difference]: With dead ends: 27 [2018-12-02 13:21:37,058 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 13:21:37,059 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-02 13:21:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 13:21:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2018-12-02 13:21:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-02 13:21:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2018-12-02 13:21:37,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2018-12-02 13:21:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:37,063 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2018-12-02 13:21:37,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 13:21:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2018-12-02 13:21:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 13:21:37,064 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:37,064 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:37,064 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:37,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2018-12-02 13:21:37,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:37,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:21:37,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,065 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:37,121 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:37,121 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:37,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:37,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 13:21:37,129 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 13:21:37,138 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 13:21:37,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:37,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,189 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:37,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-12-02 13:21:37,254 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 13:21:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 13:21:37,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-02 13:21:37,255 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 9 states. [2018-12-02 13:21:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:37,311 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-12-02 13:21:37,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 13:21:37,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-12-02 13:21:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:37,312 INFO L225 Difference]: With dead ends: 30 [2018-12-02 13:21:37,312 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 13:21:37,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-02 13:21:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 13:21:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-12-02 13:21:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 13:21:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-02 13:21:37,317 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2018-12-02 13:21:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:37,317 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-02 13:21:37,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 13:21:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-02 13:21:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 13:21:37,318 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:37,318 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:37,319 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:37,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 4 times [2018-12-02 13:21:37,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:37,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:21:37,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,320 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:37,392 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:37,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:37,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,392 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:37,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:37,398 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 13:21:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:37,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:37,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-12-02 13:21:37,561 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:37,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 13:21:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 13:21:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2018-12-02 13:21:37,562 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 11 states. [2018-12-02 13:21:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:37,621 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-12-02 13:21:37,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 13:21:37,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2018-12-02 13:21:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:37,622 INFO L225 Difference]: With dead ends: 33 [2018-12-02 13:21:37,622 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 13:21:37,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2018-12-02 13:21:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 13:21:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-02 13:21:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 13:21:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-12-02 13:21:37,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2018-12-02 13:21:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:37,625 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-12-02 13:21:37,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 13:21:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-12-02 13:21:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 13:21:37,626 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:37,626 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:37,626 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:37,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1904607445, now seen corresponding path program 5 times [2018-12-02 13:21:37,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:37,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:37,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:37,627 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,681 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:37,681 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:37,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:37,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:37,681 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:37,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 13:21:37,687 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 13:21:37,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-02 13:21:37,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:37,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,796 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:37,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:37,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2018-12-02 13:21:37,957 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:37,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 13:21:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 13:21:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2018-12-02 13:21:37,958 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 13 states. [2018-12-02 13:21:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:38,046 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-02 13:21:38,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 13:21:38,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-12-02 13:21:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:38,047 INFO L225 Difference]: With dead ends: 36 [2018-12-02 13:21:38,047 INFO L226 Difference]: Without dead ends: 31 [2018-12-02 13:21:38,048 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2018-12-02 13:21:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-02 13:21:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2018-12-02 13:21:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 13:21:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2018-12-02 13:21:38,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2018-12-02 13:21:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:38,052 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2018-12-02 13:21:38,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 13:21:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2018-12-02 13:21:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 13:21:38,053 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:38,053 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:38,054 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:38,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1015181846, now seen corresponding path program 6 times [2018-12-02 13:21:38,054 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:38,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:38,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:21:38,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:38,055 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:38,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:38,127 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:38,127 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:38,127 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:38,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:38,127 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:38,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 13:21:38,134 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 13:21:38,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 13:21:38,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:38,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:38,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:38,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:38,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2018-12-02 13:21:38,480 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:38,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 13:21:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 13:21:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2018-12-02 13:21:38,481 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 15 states. [2018-12-02 13:21:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:38,549 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2018-12-02 13:21:38,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 13:21:38,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-12-02 13:21:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:38,549 INFO L225 Difference]: With dead ends: 39 [2018-12-02 13:21:38,549 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 13:21:38,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2018-12-02 13:21:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 13:21:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-02 13:21:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 13:21:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-02 13:21:38,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2018-12-02 13:21:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:38,553 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-02 13:21:38,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 13:21:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-02 13:21:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-02 13:21:38,554 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:38,554 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:38,554 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:38,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash -209588939, now seen corresponding path program 7 times [2018-12-02 13:21:38,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:38,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:38,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:21:38,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:38,555 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:38,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:38,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 13:21:38,617 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 13:21:38,618 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 13:21:38,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:38,618 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:38,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:38,624 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 13:21:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:38,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:38,795 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:39,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 13:21:39,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 25 [2018-12-02 13:21:39,014 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 13:21:39,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 13:21:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 13:21:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2018-12-02 13:21:39,015 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 17 states. [2018-12-02 13:21:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:39,089 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2018-12-02 13:21:39,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 13:21:39,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2018-12-02 13:21:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:39,090 INFO L225 Difference]: With dead ends: 42 [2018-12-02 13:21:39,090 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 13:21:39,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2018-12-02 13:21:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 13:21:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-12-02 13:21:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-02 13:21:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2018-12-02 13:21:39,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 31 [2018-12-02 13:21:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:39,093 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2018-12-02 13:21:39,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 13:21:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2018-12-02 13:21:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 13:21:39,094 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:39,094 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:39,094 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:39,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1608865354, now seen corresponding path program 8 times [2018-12-02 13:21:39,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 13:21:39,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:39,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:39,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 13:21:39,095 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 13:21:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 13:21:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 13:21:39,126 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 13:21:39,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:21:39 BoogieIcfgContainer [2018-12-02 13:21:39,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 13:21:39,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 13:21:39,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 13:21:39,144 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 13:21:39,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:36" (3/4) ... [2018-12-02 13:21:39,146 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 13:21:39,146 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 13:21:39,147 INFO L168 Benchmark]: Toolchain (without parser) took 3055.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 950.8 MB in the beginning and 1.0 GB in the end (delta: -78.8 MB). Peak memory consumption was 103.1 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:39,148 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:39,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 120.18 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:39,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.80 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:39,148 INFO L168 Benchmark]: Boogie Preprocessor took 41.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -145.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:39,149 INFO L168 Benchmark]: RCFGBuilder took 116.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:39,149 INFO L168 Benchmark]: TraceAbstraction took 2760.62 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 94.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 40.0 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:39,149 INFO L168 Benchmark]: Witness Printer took 2.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:39,151 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 120.18 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.80 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 41.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -145.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 116.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2760.62 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 94.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 40.0 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 22, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L14] unsigned char x; [L15] unsigned char y; [L16] unsigned char c; [L18] x = 37 [L19] y = 0 [L20] c = 0 VAL [c=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=0, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=0, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=1, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=1, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=1, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=2, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=2, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=2, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=3, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=3, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=3, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=4, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=4, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=4, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=5, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=5, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=5, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=6, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=6, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=6, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=7, i=0, x=37, y=0] [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; VAL [c=7, x=37, y=0] [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i VAL [bit=1, c=7, i=0, x=37, y=0] [L27] c = c + ((unsigned char)1) VAL [bit=1, c=8, i=0, x=37, y=0] [L21] COND FALSE !(c < (unsigned char)8) VAL [bit=1, c=8, i=0, x=37, y=0] [L29] CALL __VERIFIER_assert(x == y) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 2.7s OverallTime, 10 OverallIterations, 8 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 173 SDtfs, 141 SDslu, 766 SDs, 0 SdLazy, 579 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 355 GetRequests, 241 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 362 NumberOfCodeBlocks, 362 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 459 ConstructedInterpolants, 70 QuantifiedInterpolants, 140610 SizeOfPredicates, 10 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 0/588 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-02 13:21:40,443 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 13:21:40,444 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 13:21:40,450 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-02 13:21:40,454 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 13:21:40,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 13:21:40,455 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 13:21:40,456 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 13:21:40,456 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 13:21:40,457 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 13:21:40,457 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 13:21:40,458 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 13:21:40,459 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 13:21:40,460 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 13:21:40,460 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 13:21:40,462 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 13:21:40,462 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 13:21:40,462 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 13:21:40,462 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 13:21:40,463 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 13:21:40,463 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 13:21:40,464 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 13:21:40,464 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 13:21:40,464 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 13:21:40,465 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 13:21:40,465 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 13:21:40,465 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 13:21:40,466 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 13:21:40,466 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 13:21:40,466 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-02 13:21:40,474 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 13:21:40,474 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 13:21:40,474 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 13:21:40,474 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 13:21:40,475 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 13:21:40,475 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 13:21:40,475 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 13:21:40,475 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 13:21:40,475 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 13:21:40,475 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 13:21:40,476 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 13:21:40,476 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 13:21:40,477 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 13:21:40,477 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 13:21:40,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 13:21:40,478 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-02 13:21:40,478 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_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan 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 -> Taipan 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 -> d2a071cc6090a217f48ed180b566a651717a8e39 [2018-12-02 13:21:40,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 13:21:40,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 13:21:40,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 13:21:40,506 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 13:21:40,506 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 13:21:40,507 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:40,542 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f8bd04a19/5e55821cf05a4dc3b8d4642ac7486cf5/FLAG6c0c8bd57 [2018-12-02 13:21:40,898 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 13:21:40,899 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/sv-benchmarks/c/bitvector/num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:40,902 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f8bd04a19/5e55821cf05a4dc3b8d4642ac7486cf5/FLAG6c0c8bd57 [2018-12-02 13:21:41,277 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/data/f8bd04a19/5e55821cf05a4dc3b8d4642ac7486cf5 [2018-12-02 13:21:41,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 13:21:41,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 13:21:41,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 13:21:41,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 13:21:41,285 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 13:21:41,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44dcf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41, skipping insertion in model container [2018-12-02 13:21:41,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 13:21:41,307 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 13:21:41,403 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:21:41,406 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 13:21:41,417 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 13:21:41,425 INFO L195 MainTranslator]: Completed translation [2018-12-02 13:21:41,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41 WrapperNode [2018-12-02 13:21:41,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 13:21:41,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 13:21:41,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 13:21:41,426 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 13:21:41,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 13:21:41,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 13:21:41,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 13:21:41,441 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 13:21:41,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... [2018-12-02 13:21:41,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 13:21:41,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 13:21:41,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 13:21:41,458 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 13:21:41,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 13:21:41,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 13:21:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 13:21:41,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 13:21:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 13:21:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 13:21:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 13:21:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 13:21:41,604 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 13:21:41,604 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 13:21:41,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:41 BoogieIcfgContainer [2018-12-02 13:21:41,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 13:21:41,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 13:21:41,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 13:21:41,607 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 13:21:41,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:21:41" (1/3) ... [2018-12-02 13:21:41,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7204b27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:41, skipping insertion in model container [2018-12-02 13:21:41,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:41" (2/3) ... [2018-12-02 13:21:41,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7204b27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:41, skipping insertion in model container [2018-12-02 13:21:41,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:41" (3/3) ... [2018-12-02 13:21:41,609 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_1_true-unreach-call_true-no-overflow.i [2018-12-02 13:21:41,615 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 13:21:41,619 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 13:21:41,627 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 13:21:41,644 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 13:21:41,644 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 13:21:41,644 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 13:21:41,644 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 13:21:41,644 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 13:21:41,644 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 13:21:41,645 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 13:21:41,645 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 13:21:41,645 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 13:21:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-02 13:21:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 13:21:41,657 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:41,658 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:41,659 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:41,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-12-02 13:21:41,664 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:41,664 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:41,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:41,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,709 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 13:21:41,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:21:41,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 13:21:41,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 13:21:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 13:21:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 13:21:41,723 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-12-02 13:21:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:41,735 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-02 13:21:41,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 13:21:41,736 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 13:21:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:41,741 INFO L225 Difference]: With dead ends: 32 [2018-12-02 13:21:41,741 INFO L226 Difference]: Without dead ends: 13 [2018-12-02 13:21:41,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 13:21:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-02 13:21:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-02 13:21:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-02 13:21:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-02 13:21:41,763 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-02 13:21:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:41,763 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-02 13:21:41,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 13:21:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-02 13:21:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 13:21:41,764 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:41,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:41,764 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:41,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2018-12-02 13:21:41,764 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:41,765 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:41,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:41,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,817 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 13:21:41,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 13:21:41,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 13:21:41,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 13:21:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 13:21:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 13:21:41,819 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-12-02 13:21:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:41,830 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-12-02 13:21:41,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 13:21:41,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-02 13:21:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:41,830 INFO L225 Difference]: With dead ends: 21 [2018-12-02 13:21:41,831 INFO L226 Difference]: Without dead ends: 16 [2018-12-02 13:21:41,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 13:21:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-02 13:21:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-12-02 13:21:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-02 13:21:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-02 13:21:41,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-02 13:21:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:41,833 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-02 13:21:41,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 13:21:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-02 13:21:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 13:21:41,834 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:41,834 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:41,834 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:41,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2018-12-02 13:21:41,835 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:41,835 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:41,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:41,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:41,897 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:41,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:41,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:41,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 13:21:41,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 5] total 7 [2018-12-02 13:21:41,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 13:21:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 13:21:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-02 13:21:41,946 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-12-02 13:21:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:41,985 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2018-12-02 13:21:41,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 13:21:41,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-12-02 13:21:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:41,986 INFO L225 Difference]: With dead ends: 28 [2018-12-02 13:21:41,986 INFO L226 Difference]: Without dead ends: 23 [2018-12-02 13:21:41,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-12-02 13:21:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-02 13:21:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 13:21:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 13:21:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-12-02 13:21:41,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2018-12-02 13:21:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:41,990 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-12-02 13:21:41,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 13:21:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-12-02 13:21:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 13:21:41,990 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:41,990 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:41,990 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:41,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 2 times [2018-12-02 13:21:41,991 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:41,991 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:42,009 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 13:21:42,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:21:42,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:42,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 13:21:42,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 13:21:42,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:42,089 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:42,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 13:21:42,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:21:42,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:42,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:42,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:42,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 13:21:42,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 8] total 18 [2018-12-02 13:21:42,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 13:21:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 13:21:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2018-12-02 13:21:42,338 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 18 states. [2018-12-02 13:21:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:42,887 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2018-12-02 13:21:42,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-02 13:21:42,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2018-12-02 13:21:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:42,890 INFO L225 Difference]: With dead ends: 71 [2018-12-02 13:21:42,890 INFO L226 Difference]: Without dead ends: 58 [2018-12-02 13:21:42,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=994, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 13:21:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-02 13:21:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2018-12-02 13:21:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-02 13:21:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2018-12-02 13:21:42,898 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2018-12-02 13:21:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:42,898 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2018-12-02 13:21:42,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 13:21:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2018-12-02 13:21:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 13:21:42,899 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:42,899 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:42,899 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:42,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1137706810, now seen corresponding path program 1 times [2018-12-02 13:21:42,899 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:42,900 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:42,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 13:21:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:42,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-02 13:21:42,980 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-02 13:21:43,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:43,062 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:43,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 13:21:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 13:21:43,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:43,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:43,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 13:21:43,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 13] total 28 [2018-12-02 13:21:43,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-02 13:21:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-02 13:21:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2018-12-02 13:21:43,593 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 28 states. [2018-12-02 13:21:44,094 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2018-12-02 13:21:44,408 WARN L180 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2018-12-02 13:21:44,764 WARN L180 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2018-12-02 13:21:45,156 WARN L180 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2018-12-02 13:21:45,553 WARN L180 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2018-12-02 13:21:45,795 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2018-12-02 13:21:46,115 WARN L180 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2018-12-02 13:21:46,429 WARN L180 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2018-12-02 13:21:46,687 WARN L180 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2018-12-02 13:21:46,967 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2018-12-02 13:21:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:46,973 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2018-12-02 13:21:46,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-02 13:21:46,974 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 34 [2018-12-02 13:21:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:46,974 INFO L225 Difference]: With dead ends: 85 [2018-12-02 13:21:46,975 INFO L226 Difference]: Without dead ends: 63 [2018-12-02 13:21:46,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=714, Invalid=1836, Unknown=0, NotChecked=0, Total=2550 [2018-12-02 13:21:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-02 13:21:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-12-02 13:21:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-02 13:21:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2018-12-02 13:21:46,983 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 34 [2018-12-02 13:21:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:46,983 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2018-12-02 13:21:46,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-02 13:21:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2018-12-02 13:21:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 13:21:46,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:46,984 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:46,984 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:46,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1498618808, now seen corresponding path program 2 times [2018-12-02 13:21:46,985 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:46,985 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:46,997 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 13:21:47,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:21:47,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:47,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 13:21:47,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 13:21:47,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:47,591 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:47,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 13:21:47,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 13:21:47,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:47,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:47,755 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 13:21:49,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 13:21:49,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20, 21] total 51 [2018-12-02 13:21:49,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-02 13:21:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-02 13:21:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2018-12-02 13:21:49,332 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 51 states. [2018-12-02 13:21:49,980 WARN L180 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 108 [2018-12-02 13:21:50,332 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2018-12-02 13:21:50,656 WARN L180 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2018-12-02 13:21:51,280 WARN L180 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 117 [2018-12-02 13:21:51,992 WARN L180 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 108 [2018-12-02 13:21:52,711 WARN L180 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2018-12-02 13:21:53,233 WARN L180 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2018-12-02 13:21:55,181 WARN L180 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 125 [2018-12-02 13:21:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:55,269 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2018-12-02 13:21:55,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-12-02 13:21:55,269 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2018-12-02 13:21:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:55,270 INFO L225 Difference]: With dead ends: 142 [2018-12-02 13:21:55,270 INFO L226 Difference]: Without dead ends: 91 [2018-12-02 13:21:55,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1029, Invalid=4671, Unknown=0, NotChecked=0, Total=5700 [2018-12-02 13:21:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-12-02 13:21:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2018-12-02 13:21:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-02 13:21:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2018-12-02 13:21:55,281 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 34 [2018-12-02 13:21:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:55,281 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2018-12-02 13:21:55,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-02 13:21:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2018-12-02 13:21:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-02 13:21:55,282 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 13:21:55,282 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 13:21:55,282 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 13:21:55,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 13:21:55,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1717473526, now seen corresponding path program 3 times [2018-12-02 13:21:55,282 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 13:21:55,282 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 13:21:55,295 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-02 13:21:55,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-02 13:21:55,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:55,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-02 13:21:55,352 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-02 13:21:55,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 13:21:55,392 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/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 [2018-12-02 13:21:55,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 13:21:55,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-02 13:21:55,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 13:21:55,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 13:21:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-02 13:21:55,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 13:21:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-02 13:21:55,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 13:21:55,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 13 [2018-12-02 13:21:55,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 13:21:55,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 13:21:55,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-12-02 13:21:55,493 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 13 states. [2018-12-02 13:21:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 13:21:55,531 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2018-12-02 13:21:55,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 13:21:55,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-12-02 13:21:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 13:21:55,532 INFO L225 Difference]: With dead ends: 59 [2018-12-02 13:21:55,532 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 13:21:55,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2018-12-02 13:21:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 13:21:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 13:21:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 13:21:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 13:21:55,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2018-12-02 13:21:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 13:21:55,533 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 13:21:55,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 13:21:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 13:21:55,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 13:21:55,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 13:21:55,804 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2018-12-02 13:21:55,806 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 13:21:55,806 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 13:21:55,806 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 13:21:55,806 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 13:21:55,806 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 13:21:55,806 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 13:21:55,806 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L29(line 29) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L444 ceAbstractionStarter]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse4 (= (_ bv37 8) main_~y~0)) (.cse2 (= (_ bv1 8) main_~y~0)) (.cse0 (= (_ bv37 8) main_~x~0)) (.cse1 (= (_ bv0 8) main_~bit~0)) (.cse3 (= (_ bv5 8) main_~y~0))) (or (and .cse0 .cse1 .cse2 (= (_ bv2 8) main_~c~0)) (and .cse0 .cse1 .cse3 (= (_ bv4 8) main_~c~0)) (and (= (_ bv0 8) main_~c~0) .cse0 (= (_ bv0 8) main_~y~0)) (and .cse1 (= (_ bv8 8) main_~c~0) .cse0 .cse4) (and .cse0 .cse3 (= (_ bv3 8) main_~c~0)) (and .cse0 .cse4 (= (_ bv7 8) main_~c~0) (= main_~bit~0 ((_ extract 7 0) (bvand (_ bv37 32) ((_ zero_extend 24) ((_ extract 7 0) (bvshl (_ bv1 32) ((_ zero_extend 24) main_~c~0)))))))) (and .cse0 .cse4 (= (_ bv6 8) main_~c~0)) (and .cse0 (= (_ bv1 8) main_~c~0) (not (= ((_ zero_extend 24) main_~bit~0) (_ bv0 32))) .cse2) (and .cse0 .cse1 (= (_ bv5 8) main_~c~0) .cse3))) [2018-12-02 13:21:55,807 INFO L444 ceAbstractionStarter]: At program point L21-3(lines 21 28) the Hoare annotation is: (and (= (_ bv37 8) main_~x~0) (= (_ bv37 8) main_~y~0) (= (_ bv0 8) main_~bit~0) (= (_ bv8 8) main_~c~0)) [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-12-02 13:21:55,807 INFO L448 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-12-02 13:21:55,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:21:55 BoogieIcfgContainer [2018-12-02 13:21:55,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 13:21:55,818 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 13:21:55,818 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 13:21:55,818 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 13:21:55,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:41" (3/4) ... [2018-12-02 13:21:55,821 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 13:21:55,824 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 13:21:55,825 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 13:21:55,825 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-02 13:21:55,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 13:21:55,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 13:21:55,827 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 13:21:55,849 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_37c1c4bc-b299-41c5-a3dd-ebdcfc2d6ff6/bin-2019/utaipan/witness.graphml [2018-12-02 13:21:55,850 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 13:21:55,850 INFO L168 Benchmark]: Toolchain (without parser) took 14569.83 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 330.3 MB). Free memory was 943.4 MB in the beginning and 967.6 MB in the end (delta: -24.2 MB). Peak memory consumption was 306.1 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:55,851 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:55,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.65 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:55,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.27 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:55,851 INFO L168 Benchmark]: Boogie Preprocessor took 17.01 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:55,851 INFO L168 Benchmark]: RCFGBuilder took 146.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:55,852 INFO L168 Benchmark]: TraceAbstraction took 14213.00 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 195.0 MB). Free memory was 1.1 GB in the beginning and 967.6 MB in the end (delta: 138.6 MB). Peak memory consumption was 333.6 MB. Max. memory is 11.5 GB. [2018-12-02 13:21:55,852 INFO L168 Benchmark]: Witness Printer took 31.44 ms. Allocated memory is still 1.4 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 13:21:55,853 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.65 ms. Allocated memory is still 1.0 GB. Free memory was 943.4 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.27 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.01 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 146.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14213.00 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 195.0 MB). Free memory was 1.1 GB in the beginning and 967.6 MB in the end (delta: 138.6 MB). Peak memory consumption was 333.6 MB. Max. memory is 11.5 GB. * Witness Printer took 31.44 ms. Allocated memory is still 1.4 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((((37bv8 == x && 0bv8 == bit) && 1bv8 == y) && 2bv8 == c) || (((37bv8 == x && 0bv8 == bit) && 5bv8 == y) && 4bv8 == c)) || ((0bv8 == c && 37bv8 == x) && 0bv8 == y)) || (((0bv8 == bit && 8bv8 == c) && 37bv8 == x) && 37bv8 == y)) || ((37bv8 == x && 5bv8 == y) && 3bv8 == c)) || (((37bv8 == x && 37bv8 == y) && 7bv8 == c) && bit == ~bvand32(37bv32, ~zero_extendFrom8To32(~bvshl32(1bv32, ~zero_extendFrom8To32(c))[7:0]))[7:0])) || ((37bv8 == x && 37bv8 == y) && 6bv8 == c)) || (((37bv8 == x && 1bv8 == c) && !(~zero_extendFrom8To32(bit) == 0bv32)) && 1bv8 == y)) || (((37bv8 == x && 0bv8 == bit) && 5bv8 == c) && 5bv8 == y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 14.1s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 9.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 448 SDslu, 612 SDs, 0 SdLazy, 1010 SolverSat, 321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 627 GetRequests, 440 SyntacticMatches, 8 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 24 NumberOfFragments, 137 HoareAnnotationTreeSize, 14 FomulaSimplifications, 441 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 2354 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 546 ConstructedInterpolants, 0 QuantifiedInterpolants, 192687 SizeOfPredicates, 36 NumberOfNonLiveVariables, 562 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 541/1196 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...