./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rewnif.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rewnif.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 21:53:22,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:53:22,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:53:22,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:53:22,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:53:22,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:53:22,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:53:22,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:53:22,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:53:22,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:53:22,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:53:22,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:53:22,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:53:22,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:53:22,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:53:22,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:53:22,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:53:22,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:53:22,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:53:22,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:53:22,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:53:22,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:53:22,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:53:22,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:53:22,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:53:22,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:53:22,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:53:22,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:53:22,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:53:22,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:53:22,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:53:22,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:53:22,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:53:22,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:53:22,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:53:22,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:53:22,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:53:22,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:53:22,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:53:22,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:53:22,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:53:22,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 21:53:22,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:53:22,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:53:22,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:53:22,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:53:22,760 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:53:22,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:53:22,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:53:22,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 21:53:22,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:53:22,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:53:22,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:53:22,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:53:22,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:53:22,762 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:53:22,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:53:22,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:53:22,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:53:22,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:53:22,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:53:22,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:53:22,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:53:22,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:53:22,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:53:22,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:53:22,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:53:22,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 21:53:22,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 21:53:22,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:53:22,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:53:22,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 [2020-10-19 21:53:22,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:53:22,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:53:23,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:53:23,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:53:23,008 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:53:23,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2020-10-19 21:53:23,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d3a1e35/30aa09b821e34bcea60084cbeeb63f59/FLAG77f63a63a [2020-10-19 21:53:23,536 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:53:23,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2020-10-19 21:53:23,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d3a1e35/30aa09b821e34bcea60084cbeeb63f59/FLAG77f63a63a [2020-10-19 21:53:23,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d3a1e35/30aa09b821e34bcea60084cbeeb63f59 [2020-10-19 21:53:23,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:53:23,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:53:23,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:23,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:53:23,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:53:23,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36422439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23, skipping insertion in model container [2020-10-19 21:53:23,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:53:23,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:53:24,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:24,162 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:53:24,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:24,201 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:53:24,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24 WrapperNode [2020-10-19 21:53:24,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:24,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:24,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:53:24,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:53:24,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:24,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:53:24,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:53:24,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:53:24,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... [2020-10-19 21:53:24,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:53:24,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:53:24,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:53:24,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:53:24,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 21:53:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 21:53:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:53:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 21:53:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 21:53:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:53:24,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:53:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 21:53:24,664 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:53:24,665 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-19 21:53:24,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:24 BoogieIcfgContainer [2020-10-19 21:53:24,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:53:24,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:53:24,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:53:24,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:53:24,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:53:23" (1/3) ... [2020-10-19 21:53:24,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796e45b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:24, skipping insertion in model container [2020-10-19 21:53:24,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:24" (2/3) ... [2020-10-19 21:53:24,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796e45b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:24, skipping insertion in model container [2020-10-19 21:53:24,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:24" (3/3) ... [2020-10-19 21:53:24,704 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2020-10-19 21:53:24,727 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:53:24,734 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:53:24,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:53:24,767 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:53:24,767 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:53:24,767 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:53:24,768 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:53:24,768 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:53:24,768 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:53:24,768 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:53:24,769 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:53:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-19 21:53:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:24,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:24,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:24,798 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2020-10-19 21:53:24,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:24,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075118680] [2020-10-19 21:53:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:24,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075118680] [2020-10-19 21:53:24,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:24,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 21:53:24,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984117874] [2020-10-19 21:53:24,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:53:24,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:53:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:24,999 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-19 21:53:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,022 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-19 21:53:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:53:25,024 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-19 21:53:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,051 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:25,051 INFO L226 Difference]: Without dead ends: 14 [2020-10-19 21:53:25,057 INFO L677 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 [2020-10-19 21:53:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-19 21:53:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-19 21:53:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-19 21:53:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-19 21:53:25,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-10-19 21:53:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,101 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-19 21:53:25,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:53:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-19 21:53:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:25,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 21:53:25,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2020-10-19 21:53:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135440092] [2020-10-19 21:53:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135440092] [2020-10-19 21:53:25,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:25,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 21:53:25,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514126280] [2020-10-19 21:53:25,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:53:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:53:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:53:25,232 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-10-19 21:53:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,299 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-10-19 21:53:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:53:25,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-19 21:53:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,301 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:25,301 INFO L226 Difference]: Without dead ends: 18 [2020-10-19 21:53:25,303 INFO L677 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 [2020-10-19 21:53:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-19 21:53:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-19 21:53:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 21:53:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-19 21:53:25,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-10-19 21:53:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,308 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-19 21:53:25,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:53:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-19 21:53:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 21:53:25,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 21:53:25,310 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2020-10-19 21:53:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799541943] [2020-10-19 21:53:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799541943] [2020-10-19 21:53:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983330595] [2020-10-19 21:53:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:53:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:25,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:25,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-19 21:53:25,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681221956] [2020-10-19 21:53:25,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:53:25,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:53:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:53:25,531 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-19 21:53:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,590 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-19 21:53:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:53:25,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 21:53:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,592 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:25,592 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:25,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:53:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:25,604 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-10-19 21:53:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,604 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:25,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:53:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:25,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 21:53:25,807 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,807 INFO L82 PathProgramCache]: Analyzing trace with hash -211811063, now seen corresponding path program 2 times [2020-10-19 21:53:25,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253273253] [2020-10-19 21:53:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 21:53:25,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253273253] [2020-10-19 21:53:25,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:25,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:53:25,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210354812] [2020-10-19 21:53:25,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:53:25,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:53:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:53:25,900 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-19 21:53:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,961 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-19 21:53:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:53:25,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 21:53:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,962 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:25,962 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:25,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:53:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:25,968 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-19 21:53:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,969 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:25,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:53:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:25,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 21:53:25,971 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2020-10-19 21:53:25,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527334404] [2020-10-19 21:53:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527334404] [2020-10-19 21:53:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684364477] [2020-10-19 21:53:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 21:53:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:26,273 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:26,274 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:26,281 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:26,281 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:26,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-19 21:53:26,340 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:26,340 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 46 [2020-10-19 21:53:26,342 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:26,361 INFO L625 ElimStorePlain]: treesize reduction 24, result has 47.8 percent of original size [2020-10-19 21:53:26,364 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:26,364 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:22 [2020-10-19 21:53:26,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:26,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:26,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:26,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-19 21:53:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120438699] [2020-10-19 21:53:26,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 21:53:26,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:26,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 21:53:26,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-19 21:53:26,504 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 13 states. [2020-10-19 21:53:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:26,831 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-19 21:53:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 21:53:26,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-19 21:53:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:26,833 INFO L225 Difference]: With dead ends: 31 [2020-10-19 21:53:26,833 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 21:53:26,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-19 21:53:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 21:53:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-19 21:53:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 21:53:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-19 21:53:26,840 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-19 21:53:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:26,840 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-19 21:53:26,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 21:53:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-19 21:53:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 21:53:26,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:26,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:27,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:27,055 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1507685829, now seen corresponding path program 1 times [2020-10-19 21:53:27,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:27,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051129830] [2020-10-19 21:53:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:27,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051129830] [2020-10-19 21:53:27,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817227169] [2020-10-19 21:53:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 21:53:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:27,335 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:27,335 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:27,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:27,346 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:27,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-10-19 21:53:27,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:27,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:27,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:27,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-10-19 21:53:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092100478] [2020-10-19 21:53:27,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 21:53:27,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 21:53:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:53:27,423 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-19 21:53:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:27,677 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-19 21:53:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 21:53:27,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-19 21:53:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:27,686 INFO L225 Difference]: With dead ends: 60 [2020-10-19 21:53:27,686 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 21:53:27,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-19 21:53:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 21:53:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2020-10-19 21:53:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 21:53:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-19 21:53:27,696 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2020-10-19 21:53:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:27,697 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-19 21:53:27,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 21:53:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-19 21:53:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 21:53:27,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:27,698 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:27,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:27,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1836571567, now seen corresponding path program 2 times [2020-10-19 21:53:27,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:27,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787417059] [2020-10-19 21:53:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:28,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787417059] [2020-10-19 21:53:28,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199774132] [2020-10-19 21:53:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:28,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:53:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 21:53:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:28,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:28,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-19 21:53:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509686394] [2020-10-19 21:53:28,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 21:53:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 21:53:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:53:28,134 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 12 states. [2020-10-19 21:53:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:28,250 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-19 21:53:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 21:53:28,251 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-19 21:53:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:28,252 INFO L225 Difference]: With dead ends: 85 [2020-10-19 21:53:28,252 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 21:53:28,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-19 21:53:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 21:53:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-19 21:53:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 21:53:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-19 21:53:28,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2020-10-19 21:53:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:28,261 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-19 21:53:28,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 21:53:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-19 21:53:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 21:53:28,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:28,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:28,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:28,477 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1305357007, now seen corresponding path program 3 times [2020-10-19 21:53:28,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:28,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982029365] [2020-10-19 21:53:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982029365] [2020-10-19 21:53:28,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321162342] [2020-10-19 21:53:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:28,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 21:53:28,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 21:53:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:28,982 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:28,983 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:28,988 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:28,988 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:28,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-19 21:53:29,058 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:29,059 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 57 [2020-10-19 21:53:29,060 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:29,078 INFO L625 ElimStorePlain]: treesize reduction 32, result has 43.9 percent of original size [2020-10-19 21:53:29,078 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:29,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-10-19 21:53:29,144 INFO L350 Elim1Store]: treesize reduction 54, result has 49.1 percent of original size [2020-10-19 21:53:29,145 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 69 [2020-10-19 21:53:29,146 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:29,167 INFO L625 ElimStorePlain]: treesize reduction 30, result has 54.5 percent of original size [2020-10-19 21:53:29,170 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:29,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:36 [2020-10-19 21:53:29,388 INFO L350 Elim1Store]: treesize reduction 17, result has 90.8 percent of original size [2020-10-19 21:53:29,388 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 187 [2020-10-19 21:53:29,391 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:29,445 INFO L625 ElimStorePlain]: treesize reduction 121, result has 34.9 percent of original size [2020-10-19 21:53:29,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:29,453 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:29,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:65 [2020-10-19 21:53:29,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:29,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:29,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:29,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:29,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:29,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:29,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:30,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:30,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-10-19 21:53:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684091768] [2020-10-19 21:53:30,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-19 21:53:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 21:53:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-19 21:53:30,032 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 22 states. [2020-10-19 21:53:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:31,735 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-19 21:53:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-19 21:53:31,735 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-10-19 21:53:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:31,737 INFO L225 Difference]: With dead ends: 72 [2020-10-19 21:53:31,737 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 21:53:31,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2020-10-19 21:53:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 21:53:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 29. [2020-10-19 21:53:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 21:53:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-19 21:53:31,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2020-10-19 21:53:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:31,746 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-19 21:53:31,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-19 21:53:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-19 21:53:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 21:53:31,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:31,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:31,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:31,949 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 727922282, now seen corresponding path program 4 times [2020-10-19 21:53:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:31,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025370182] [2020-10-19 21:53:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025370182] [2020-10-19 21:53:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157528260] [2020-10-19 21:53:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:32,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 21:53:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 21:53:32,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:32,125 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:32,125 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:32,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:32,127 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:32,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-10-19 21:53:32,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:32,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:32,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-10-19 21:53:32,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424553912] [2020-10-19 21:53:32,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 21:53:32,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 21:53:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-19 21:53:32,217 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2020-10-19 21:53:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:32,515 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-19 21:53:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 21:53:32,516 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-19 21:53:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:32,518 INFO L225 Difference]: With dead ends: 72 [2020-10-19 21:53:32,518 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 21:53:32,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-19 21:53:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 21:53:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2020-10-19 21:53:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 21:53:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-19 21:53:32,528 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2020-10-19 21:53:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:32,528 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-19 21:53:32,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 21:53:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-19 21:53:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 21:53:32,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:32,530 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:32,733 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash -854009762, now seen corresponding path program 5 times [2020-10-19 21:53:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108496519] [2020-10-19 21:53:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108496519] [2020-10-19 21:53:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538062424] [2020-10-19 21:53:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:32,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-19 21:53:32,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 21:53:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:32,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-19 21:53:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111141395] [2020-10-19 21:53:32,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 21:53:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 21:53:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-19 21:53:32,992 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 15 states. [2020-10-19 21:53:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:33,161 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-19 21:53:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 21:53:33,162 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-19 21:53:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:33,163 INFO L225 Difference]: With dead ends: 82 [2020-10-19 21:53:33,163 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 21:53:33,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-19 21:53:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 21:53:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2020-10-19 21:53:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 21:53:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-19 21:53:33,172 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2020-10-19 21:53:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:33,173 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-19 21:53:33,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 21:53:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-19 21:53:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 21:53:33,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:33,175 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:33,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-19 21:53:33,388 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash -95736992, now seen corresponding path program 6 times [2020-10-19 21:53:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:33,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101610185] [2020-10-19 21:53:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:33,461 ERROR L253 erpolLogProxyWrapper]: Interpolant 13 not inductive [2020-10-19 21:53:33,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 21:53:33,490 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-19 21:53:33,499 INFO L168 Benchmark]: Toolchain (without parser) took 9626.69 ms. Allocated memory was 35.7 MB in the beginning and 71.8 MB in the end (delta: 36.2 MB). Free memory was 13.0 MB in the beginning and 11.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 38.1 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,508 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 34.1 MB. Free memory was 19.4 MB in the beginning and 19.4 MB in the end (delta: 27.2 kB). Peak memory consumption was 27.2 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.05 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 23.6 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 44.0 MB. Free memory was 23.4 MB in the beginning and 21.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,515 INFO L168 Benchmark]: Boogie Preprocessor took 32.91 ms. Allocated memory is still 44.0 MB. Free memory was 21.8 MB in the beginning and 20.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,519 INFO L168 Benchmark]: RCFGBuilder took 396.92 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 20.3 MB in the beginning and 16.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,519 INFO L168 Benchmark]: TraceAbstraction took 8820.22 ms. Allocated memory was 45.1 MB in the beginning and 71.8 MB in the end (delta: 26.7 MB). Free memory was 16.3 MB in the beginning and 11.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 32.0 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:33,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 34.1 MB. Free memory was 19.4 MB in the beginning and 19.4 MB in the end (delta: 27.2 kB). Peak memory consumption was 27.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 322.05 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 12.2 MB in the beginning and 23.6 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.01 ms. Allocated memory is still 44.0 MB. Free memory was 23.4 MB in the beginning and 21.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.91 ms. Allocated memory is still 44.0 MB. Free memory was 21.8 MB in the beginning and 20.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 396.92 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 20.3 MB in the beginning and 16.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 8820.22 ms. Allocated memory was 45.1 MB in the beginning and 71.8 MB in the end (delta: 26.7 MB). Free memory was 16.3 MB in the beginning and 11.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 32.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 21:53:35,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:53:35,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:53:35,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:53:35,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:53:35,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:53:35,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:53:35,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:53:35,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:53:35,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:53:35,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:53:35,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:53:35,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:53:35,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:53:35,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:53:35,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:53:35,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:53:35,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:53:35,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:53:35,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:53:35,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:53:35,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:53:35,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:53:35,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:53:35,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:53:35,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:53:35,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:53:35,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:53:35,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:53:35,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:53:35,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:53:35,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:53:35,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:53:35,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:53:35,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:53:35,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:53:35,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:53:35,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:53:35,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:53:35,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:53:35,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:53:35,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-19 21:53:35,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:53:35,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:53:35,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:53:35,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:53:35,841 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:53:35,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:53:35,842 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:53:35,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:53:35,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:53:35,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:53:35,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:53:35,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:53:35,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 21:53:35,843 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 21:53:35,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:53:35,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:53:35,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:53:35,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:53:35,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:53:35,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:53:35,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:53:35,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:53:35,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:53:35,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:53:35,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:53:35,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:53:35,847 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 21:53:35,847 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 21:53:35,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:53:35,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:53:35,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 21:53:35,848 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 [2020-10-19 21:53:36,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:53:36,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:53:36,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:53:36,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:53:36,073 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:53:36,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2020-10-19 21:53:36,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43abf60d6/85242f608c63491595b6a63dff617736/FLAG3a256adfc [2020-10-19 21:53:36,598 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:53:36,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2020-10-19 21:53:36,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43abf60d6/85242f608c63491595b6a63dff617736/FLAG3a256adfc [2020-10-19 21:53:37,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43abf60d6/85242f608c63491595b6a63dff617736 [2020-10-19 21:53:37,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:53:37,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:53:37,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:37,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:53:37,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:53:37,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2350664f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37, skipping insertion in model container [2020-10-19 21:53:37,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:53:37,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:53:37,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:37,350 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:53:37,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:37,391 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:53:37,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37 WrapperNode [2020-10-19 21:53:37,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:37,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:37,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:53:37,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:53:37,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:37,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:53:37,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:53:37,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:53:37,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... [2020-10-19 21:53:37,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:53:37,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:53:37,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:53:37,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:53:37,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 21:53:37,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 21:53:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:53:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 21:53:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 21:53:37,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:53:37,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:53:37,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 21:53:37,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:53:37,817 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-19 21:53:37,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:37 BoogieIcfgContainer [2020-10-19 21:53:37,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:53:37,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:53:37,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:53:37,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:53:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:53:37" (1/3) ... [2020-10-19 21:53:37,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215b423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:37, skipping insertion in model container [2020-10-19 21:53:37,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:37" (2/3) ... [2020-10-19 21:53:37,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215b423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:37, skipping insertion in model container [2020-10-19 21:53:37,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:37" (3/3) ... [2020-10-19 21:53:37,829 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2020-10-19 21:53:37,841 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:53:37,849 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:53:37,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:53:37,898 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:53:37,898 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:53:37,898 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:53:37,899 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:53:37,899 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:53:37,899 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:53:37,899 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:53:37,900 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:53:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-19 21:53:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:37,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:37,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:37,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2020-10-19 21:53:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:37,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744435973] [2020-10-19 21:53:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-19 21:53:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 21:53:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:38,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:38,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744435973] [2020-10-19 21:53:38,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:38,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 21:53:38,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686480726] [2020-10-19 21:53:38,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:53:38,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:53:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:38,133 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-19 21:53:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:38,151 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-19 21:53:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:53:38,153 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-19 21:53:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:38,161 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:38,161 INFO L226 Difference]: Without dead ends: 14 [2020-10-19 21:53:38,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-19 21:53:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-19 21:53:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-19 21:53:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-19 21:53:38,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-10-19 21:53:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:38,199 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-19 21:53:38,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:53:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-19 21:53:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:38,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:38,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:38,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 21:53:38,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2020-10-19 21:53:38,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:38,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320584590] [2020-10-19 21:53:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-19 21:53:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:53:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:38,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320584590] [2020-10-19 21:53:38,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:38,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-19 21:53:38,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179632833] [2020-10-19 21:53:38,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:53:38,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:53:38,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:53:38,589 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-10-19 21:53:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:38,728 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2020-10-19 21:53:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:53:38,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-19 21:53:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:38,729 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:38,730 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 21:53:38,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:53:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 21:53:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 21:53:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:38,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-10-19 21:53:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:38,738 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:38,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:53:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:38,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:38,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:38,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-19 21:53:38,950 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash -211811063, now seen corresponding path program 1 times [2020-10-19 21:53:38,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:38,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885953427] [2020-10-19 21:53:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-19 21:53:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 21:53:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 21:53:39,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885953427] [2020-10-19 21:53:39,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:53:39,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-10-19 21:53:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396763604] [2020-10-19 21:53:39,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:53:39,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:53:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:53:39,223 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-19 21:53:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:39,349 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-19 21:53:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:53:39,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 21:53:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:39,351 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:39,351 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:39,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:53:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:39,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-19 21:53:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:39,358 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:39,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:53:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:39,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:39,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:39,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-19 21:53:39,572 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2020-10-19 21:53:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:39,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039302448] [2020-10-19 21:53:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-19 21:53:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 21:53:39,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:39,695 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:39,696 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:39,714 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:39,715 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:39,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-19 21:53:39,765 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-10-19 21:53:39,765 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-10-19 21:53:39,766 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:39,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:39,777 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:39,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-10-19 21:53:39,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:40,098 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2020-10-19 21:53:40,105 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 164 [2020-10-19 21:53:40,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,109 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,113 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,187 INFO L625 ElimStorePlain]: treesize reduction 129, result has 17.8 percent of original size [2020-10-19 21:53:40,188 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:40,205 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,208 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,210 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:40,211 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:28 [2020-10-19 21:53:40,212 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:40,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039302448] [2020-10-19 21:53:40,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:40,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-19 21:53:40,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032890132] [2020-10-19 21:53:40,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 21:53:40,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 21:53:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-19 21:53:40,305 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2020-10-19 21:53:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:52,103 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-19 21:53:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-19 21:53:52,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-19 21:53:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:52,105 INFO L225 Difference]: With dead ends: 87 [2020-10-19 21:53:52,105 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 21:53:52,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-19 21:53:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 21:53:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2020-10-19 21:53:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 21:53:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-19 21:53:52,119 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2020-10-19 21:53:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:52,120 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-19 21:53:52,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 21:53:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-19 21:53:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 21:53:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:52,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:52,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-19 21:53:52,327 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1035365187, now seen corresponding path program 2 times [2020-10-19 21:53:52,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:52,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225754239] [2020-10-19 21:53:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-19 21:53:52,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:53:52,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 21:53:52,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:52,426 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:52,427 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,446 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,446 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,447 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 21:53:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,497 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2020-10-19 21:53:52,498 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,516 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,517 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-10-19 21:53:52,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,561 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,562 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2020-10-19 21:53:52,564 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,585 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,678 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,678 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2020-10-19 21:53:52,680 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,710 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,711 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 21:53:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,781 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,781 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2020-10-19 21:53:52,784 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,830 INFO L625 ElimStorePlain]: treesize reduction 9, result has 83.6 percent of original size [2020-10-19 21:53:52,830 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:46 [2020-10-19 21:53:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:52,942 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,942 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 49 [2020-10-19 21:53:52,944 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:52,966 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:52,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:38 [2020-10-19 21:53:53,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-10-19 21:53:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:53,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225754239] [2020-10-19 21:53:53,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [124646928] [2020-10-19 21:53:53,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 21:53:53,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:53:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 21:53:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:53,593 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:53,594 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,604 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 21:53:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,624 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2020-10-19 21:53:53,625 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,641 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,642 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,642 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-10-19 21:53:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,660 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,661 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2020-10-19 21:53:53,662 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,683 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,683 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,706 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,706 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2020-10-19 21:53:53,708 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,732 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,733 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,733 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 21:53:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,759 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,759 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2020-10-19 21:53:53,761 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,810 INFO L625 ElimStorePlain]: treesize reduction 9, result has 83.6 percent of original size [2020-10-19 21:53:53,810 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:46 [2020-10-19 21:53:53,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,865 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,865 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 49 [2020-10-19 21:53:53,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:53,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538650310] [2020-10-19 21:53:53,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:53,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:53:53,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:53,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 21:53:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:53,945 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:53,946 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,956 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 21:53:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,967 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2020-10-19 21:53:53,968 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,983 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:53,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-10-19 21:53:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:53,998 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:53,998 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2020-10-19 21:53:53,999 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:54,025 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,079 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:54,079 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2020-10-19 21:53:54,080 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:54,103 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,104 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-10-19 21:53:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 21:53:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,123 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:54,123 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2020-10-19 21:53:54,125 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,175 INFO L625 ElimStorePlain]: treesize reduction 9, result has 83.6 percent of original size [2020-10-19 21:53:54,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:54,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:46 [2020-10-19 21:53:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 21:53:54,197 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:54,198 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 49 [2020-10-19 21:53:54,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:54,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:54,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 21:53:54,200 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 21:53:54,200 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 21:53:54,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:54,826 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 21:53:54,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 09:53:54 BoogieIcfgContainer [2020-10-19 21:53:54,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 21:53:54,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 21:53:54,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 21:53:54,827 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 21:53:54,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:37" (3/4) ... [2020-10-19 21:53:54,830 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 21:53:54,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 21:53:54,832 INFO L168 Benchmark]: Toolchain (without parser) took 17808.74 ms. Allocated memory was 35.1 MB in the beginning and 57.7 MB in the end (delta: 22.5 MB). Free memory was 12.3 MB in the beginning and 17.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,833 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.75 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.5 MB in the beginning and 23.1 MB in the end (delta: -11.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,834 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.77 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,835 INFO L168 Benchmark]: Boogie Preprocessor took 35.30 ms. Allocated memory is still 43.5 MB. Free memory was 21.3 MB in the beginning and 19.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,836 INFO L168 Benchmark]: RCFGBuilder took 350.14 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.8 MB in the beginning and 18.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,837 INFO L168 Benchmark]: TraceAbstraction took 17005.64 ms. Allocated memory was 45.6 MB in the beginning and 57.7 MB in the end (delta: 12.1 MB). Free memory was 17.6 MB in the beginning and 18.0 MB in the end (delta: -454.5 kB). Peak memory consumption was 11.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,837 INFO L168 Benchmark]: Witness Printer took 3.92 ms. Allocated memory is still 57.7 MB. Free memory was 18.0 MB in the beginning and 17.4 MB in the end (delta: 591.3 kB). Peak memory consumption was 591.3 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:54,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.1 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 362.75 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.5 MB in the beginning and 23.1 MB in the end (delta: -11.6 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.77 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 35.30 ms. Allocated memory is still 43.5 MB. Free memory was 21.3 MB in the beginning and 19.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 350.14 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 19.8 MB in the beginning and 18.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 17005.64 ms. Allocated memory was 45.6 MB in the beginning and 57.7 MB in the end (delta: 12.1 MB). Free memory was 17.6 MB in the beginning and 18.0 MB in the end (delta: -454.5 kB). Peak memory consumption was 11.6 MB. Max. memory is 14.3 GB. * Witness Printer took 3.92 ms. Allocated memory is still 57.7 MB. Free memory was 18.0 MB in the beginning and 17.4 MB in the end (delta: 591.3 kB). Peak memory consumption was 591.3 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 [L24] COND TRUE i < SIZE [L26] COND TRUE (i+1) < SIZE [L28] a[i+1] = i [L30] a[i] = i [L24] i++ [L24] COND TRUE i < SIZE [L26] COND TRUE (i+1) < SIZE [L28] a[i+1] = i [L30] a[i] = i [L24] i++ [L24] COND TRUE i < SIZE [L26] COND TRUE (i+1) < SIZE [L28] a[i+1] = i [L30] a[i] = i [L24] i++ [L24] COND TRUE i < SIZE [L26] COND FALSE !((i+1) < SIZE) [L30] a[i] = i [L24] i++ [L24] COND FALSE !(i < SIZE) [L33] i = 0 [L33] COND TRUE i < SIZE [L35] a[i] [L8] COND TRUE !(cond) [L3] __assert_fail("0", "rewnif.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 16.9s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 132 SDslu, 92 SDs, 0 SdLazy, 253 SolverSat, 61 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 43 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 6959 SizeOfPredicates, 18 NumberOfNonLiveVariables, 191 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 6/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...