./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.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-fpi/condn.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 6214f4db7387e2131d208374d1f209301dbf8d25 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-fpi/condn.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 6214f4db7387e2131d208374d1f209301dbf8d25 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 22:11:21,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:11:21,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:11:21,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:11:21,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:11:21,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:11:21,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:11:21,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:11:21,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:11:21,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:11:21,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:11:21,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:11:21,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:11:21,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:11:21,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:11:21,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:11:21,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:11:21,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:11:21,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:11:21,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:11:21,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:11:21,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:11:21,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:11:21,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:11:21,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:11:21,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:11:21,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:11:21,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:11:21,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:11:21,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:11:21,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:11:21,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:11:21,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:11:21,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:11:21,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:11:21,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:11:21,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:11:21,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:11:21,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:11:21,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:11:21,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:11:21,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:11:21,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:11:21,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:11:21,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:11:21,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:11:21,703 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:11:21,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:11:21,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:11:21,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:11:21,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:11:21,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:11:21,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:11:21,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:11:21,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:11:21,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:11:21,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:11:21,706 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:11:21,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:11:21,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:11:21,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:11:21,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:11:21,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:11:21,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:11:21,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:11:21,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:11:21,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:11:21,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:11:21,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:11:21,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:11:21,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:11:21,710 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 -> 6214f4db7387e2131d208374d1f209301dbf8d25 [2020-10-19 22:11:21,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:11:21,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:11:21,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:11:21,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:11:21,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:11:21,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2020-10-19 22:11:22,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f967620/b2db4f5c3b034c5da7dfb128d07232f3/FLAG1b498110e [2020-10-19 22:11:22,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:11:22,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2020-10-19 22:11:22,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f967620/b2db4f5c3b034c5da7dfb128d07232f3/FLAG1b498110e [2020-10-19 22:11:23,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05f967620/b2db4f5c3b034c5da7dfb128d07232f3 [2020-10-19 22:11:23,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:11:23,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:11:23,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:23,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:11:23,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:11:23,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8df9c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23, skipping insertion in model container [2020-10-19 22:11:23,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:11:23,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:11:23,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:23,286 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:11:23,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:23,327 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:11:23,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23 WrapperNode [2020-10-19 22:11:23,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:23,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:23,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:11:23,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:11:23,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:23,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:11:23,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:11:23,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:11:23,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (1/1) ... [2020-10-19 22:11:23,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:11:23,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:11:23,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:11:23,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:11:23,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (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 22:11:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:11:23,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:11:23,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:11:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:11:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:11:23,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:11:23,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:11:23,796 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:11:23,797 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:11:23,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:23 BoogieIcfgContainer [2020-10-19 22:11:23,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:11:23,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:11:23,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:11:23,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:11:23,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:11:23" (1/3) ... [2020-10-19 22:11:23,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c92be48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:23, skipping insertion in model container [2020-10-19 22:11:23,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:23" (2/3) ... [2020-10-19 22:11:23,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c92be48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:23, skipping insertion in model container [2020-10-19 22:11:23,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:23" (3/3) ... [2020-10-19 22:11:23,810 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2020-10-19 22:11:23,825 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:11:23,832 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:11:23,860 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:11:23,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:11:23,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:11:23,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:11:23,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:11:23,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:11:23,916 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:11:23,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:11:23,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:11:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-19 22:11:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:23,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:23,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:23,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2020-10-19 22:11:23,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561428312] [2020-10-19 22:11:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:24,125 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 22:11:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561428312] [2020-10-19 22:11:24,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:24,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:11:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574665712] [2020-10-19 22:11:24,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:11:24,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:24,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:11:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:24,151 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-19 22:11:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:24,169 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-10-19 22:11:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:11:24,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:11:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:24,180 INFO L225 Difference]: With dead ends: 41 [2020-10-19 22:11:24,180 INFO L226 Difference]: Without dead ends: 18 [2020-10-19 22:11:24,184 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 22:11:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-19 22:11:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-19 22:11:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 22:11:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-19 22:11:24,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-10-19 22:11:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:24,221 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-19 22:11:24,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:11:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-19 22:11:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:24,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:24,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:24,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:11:24,223 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2020-10-19 22:11:24,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:24,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779800479] [2020-10-19 22:11:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:24,308 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 22:11:24,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779800479] [2020-10-19 22:11:24,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:24,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:11:24,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733230395] [2020-10-19 22:11:24,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:11:24,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:11:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:11:24,321 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-19 22:11:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:24,394 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-19 22:11:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:11:24,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 22:11:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:24,396 INFO L225 Difference]: With dead ends: 40 [2020-10-19 22:11:24,396 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:11:24,398 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 22:11:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:11:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-10-19 22:11:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 22:11:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-19 22:11:24,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2020-10-19 22:11:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:24,406 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-19 22:11:24,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:11:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-19 22:11:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:11:24,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:24,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:24,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:11:24,408 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2020-10-19 22:11:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:24,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121004127] [2020-10-19 22:11:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:24,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121004127] [2020-10-19 22:11:24,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117853592] [2020-10-19 22:11:24,724 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 22:11:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 22:11:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:24,929 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 0 case distinctions, treesize of input 25 treesize of output 13 [2020-10-19 22:11:24,931 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:24,937 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:24,937 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:24,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:9 [2020-10-19 22:11:25,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:25,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:25,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-19 22:11:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974976777] [2020-10-19 22:11:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 22:11:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 22:11:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:11:25,092 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 13 states. [2020-10-19 22:11:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:25,317 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-10-19 22:11:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 22:11:25,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-19 22:11:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:25,319 INFO L225 Difference]: With dead ends: 47 [2020-10-19 22:11:25,319 INFO L226 Difference]: Without dead ends: 45 [2020-10-19 22:11:25,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-19 22:11:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-19 22:11:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2020-10-19 22:11:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 22:11:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-19 22:11:25,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2020-10-19 22:11:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:25,328 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-19 22:11:25,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 22:11:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-19 22:11:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:11:25,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:25,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:25,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:11:25,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash -367867722, now seen corresponding path program 1 times [2020-10-19 22:11:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:25,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636391765] [2020-10-19 22:11:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:25,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636391765] [2020-10-19 22:11:25,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054376310] [2020-10-19 22:11:25,713 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 22:11:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 22:11:25,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:25,811 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 11 treesize of output 7 [2020-10-19 22:11:25,812 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:25,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:25,814 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:25,814 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-19 22:11:25,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:25,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:25,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-19 22:11:25,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130232405] [2020-10-19 22:11:25,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 22:11:25,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 22:11:25,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:11:25,866 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 11 states. [2020-10-19 22:11:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:26,046 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-19 22:11:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:11:26,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-19 22:11:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:26,048 INFO L225 Difference]: With dead ends: 53 [2020-10-19 22:11:26,048 INFO L226 Difference]: Without dead ends: 51 [2020-10-19 22:11:26,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-10-19 22:11:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-19 22:11:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-10-19 22:11:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 22:11:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-19 22:11:26,056 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-10-19 22:11:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:26,056 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-19 22:11:26,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 22:11:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-19 22:11:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:11:26,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:26,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:26,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:26,272 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:26,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash -203188002, now seen corresponding path program 1 times [2020-10-19 22:11:26,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:26,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578469417] [2020-10-19 22:11:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:26,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578469417] [2020-10-19 22:11:26,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884612783] [2020-10-19 22:11:26,334 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 22:11:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:26,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:26,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:26,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:11:26,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010061047] [2020-10-19 22:11:26,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:11:26,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:26,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:11:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:11:26,448 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 10 states. [2020-10-19 22:11:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:26,585 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-19 22:11:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:11:26,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-19 22:11:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:26,588 INFO L225 Difference]: With dead ends: 87 [2020-10-19 22:11:26,588 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 22:11:26,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 22:11:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 22:11:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2020-10-19 22:11:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 22:11:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-19 22:11:26,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 20 [2020-10-19 22:11:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:26,597 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-19 22:11:26,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:11:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-19 22:11:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 22:11:26,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:26,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:26,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:26,814 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash -15377572, now seen corresponding path program 2 times [2020-10-19 22:11:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:26,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501619204] [2020-10-19 22:11:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 22:11:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501619204] [2020-10-19 22:11:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072026686] [2020-10-19 22:11:27,170 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 22:11:27,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:11:27,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:11:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 22:11:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:27,290 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 0 case distinctions, treesize of input 25 treesize of output 13 [2020-10-19 22:11:27,291 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:27,296 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:27,296 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:27,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:13 [2020-10-19 22:11:27,333 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:27,333 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 25 treesize of output 48 [2020-10-19 22:11:27,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:27,348 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:27,393 INFO L625 ElimStorePlain]: treesize reduction 16, result has 66.7 percent of original size [2020-10-19 22:11:27,393 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:27,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:32 [2020-10-19 22:11:27,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:27,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:27,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:27,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:27,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-19 22:11:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:27,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:27,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2020-10-19 22:11:27,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057833373] [2020-10-19 22:11:27,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-19 22:11:27,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-19 22:11:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-19 22:11:27,670 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 20 states. [2020-10-19 22:11:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:28,803 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-19 22:11:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-19 22:11:28,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-10-19 22:11:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:28,805 INFO L225 Difference]: With dead ends: 72 [2020-10-19 22:11:28,805 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 22:11:28,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=1311, Unknown=0, NotChecked=0, Total=1640 [2020-10-19 22:11:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 22:11:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 27. [2020-10-19 22:11:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 22:11:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-19 22:11:28,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 22 [2020-10-19 22:11:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:28,814 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-19 22:11:28,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-19 22:11:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-19 22:11:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 22:11:28,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:28,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:29,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:29,029 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:29,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1454091278, now seen corresponding path program 1 times [2020-10-19 22:11:29,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:29,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733038956] [2020-10-19 22:11:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:29,109 ERROR L253 erpolLogProxyWrapper]: Interpolant 14 not inductive [2020-10-19 22:11:29,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 22:11:29,130 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 22:11:29,136 INFO L168 Benchmark]: Toolchain (without parser) took 6121.38 ms. Allocated memory was 40.9 MB in the beginning and 64.0 MB in the end (delta: 23.1 MB). Free memory was 18.9 MB in the beginning and 32.8 MB in the end (delta: -14.0 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,137 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:11:29,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.64 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.0 MB in the beginning and 18.9 MB in the end (delta: -849.3 kB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.58 ms. Allocated memory is still 41.4 MB. Free memory was 18.7 MB in the beginning and 17.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,139 INFO L168 Benchmark]: Boogie Preprocessor took 31.06 ms. Allocated memory is still 41.4 MB. Free memory was 17.0 MB in the beginning and 15.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,140 INFO L168 Benchmark]: RCFGBuilder took 391.82 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.4 MB in the beginning and 16.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,141 INFO L168 Benchmark]: TraceAbstraction took 5331.98 ms. Allocated memory was 43.0 MB in the beginning and 64.0 MB in the end (delta: 21.0 MB). Free memory was 16.1 MB in the beginning and 32.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:29,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 310.64 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 18.0 MB in the beginning and 18.9 MB in the end (delta: -849.3 kB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 46.58 ms. Allocated memory is still 41.4 MB. Free memory was 18.7 MB in the beginning and 17.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.06 ms. Allocated memory is still 41.4 MB. Free memory was 17.0 MB in the beginning and 15.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 391.82 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 15.4 MB in the beginning and 16.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5331.98 ms. Allocated memory was 43.0 MB in the beginning and 64.0 MB in the end (delta: 21.0 MB). Free memory was 16.1 MB in the beginning and 32.8 MB in the end (delta: -16.7 MB). Peak memory consumption was 4.3 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 22:11:31,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:11:31,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:11:31,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:11:31,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:11:31,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:11:31,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:11:31,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:11:31,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:11:31,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:11:31,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:11:31,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:11:31,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:11:31,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:11:31,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:11:31,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:11:31,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:11:31,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:11:31,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:11:31,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:11:31,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:11:31,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:11:31,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:11:31,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:11:31,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:11:31,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:11:31,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:11:31,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:11:31,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:11:31,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:11:31,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:11:31,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:11:31,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:11:31,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:11:31,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:11:31,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:11:31,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:11:31,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:11:31,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:11:31,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:11:31,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:11:31,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-19 22:11:31,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:11:31,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:11:31,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:11:31,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:11:31,432 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:11:31,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:11:31,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:11:31,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:11:31,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:11:31,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:11:31,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:11:31,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:11:31,434 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 22:11:31,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 22:11:31,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:11:31,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:11:31,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:11:31,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:11:31,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:11:31,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:11:31,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:11:31,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:11:31,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:11:31,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:11:31,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:11:31,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:11:31,437 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 22:11:31,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 22:11:31,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:11:31,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:11:31,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 22:11:31,438 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 -> 6214f4db7387e2131d208374d1f209301dbf8d25 [2020-10-19 22:11:31,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:11:31,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:11:31,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:11:31,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:11:31,677 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:11:31,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2020-10-19 22:11:31,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7951f0765/12a31df67bdc476a88798d37b2da9e08/FLAGe393b5c91 [2020-10-19 22:11:32,336 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:11:32,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2020-10-19 22:11:32,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7951f0765/12a31df67bdc476a88798d37b2da9e08/FLAGe393b5c91 [2020-10-19 22:11:32,717 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7951f0765/12a31df67bdc476a88798d37b2da9e08 [2020-10-19 22:11:32,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:11:32,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:11:32,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:32,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:11:32,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:11:32,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:32" (1/1) ... [2020-10-19 22:11:32,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bd0924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:32, skipping insertion in model container [2020-10-19 22:11:32,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:32" (1/1) ... [2020-10-19 22:11:32,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:11:32,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:11:32,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:32,998 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:11:33,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:33,041 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:11:33,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33 WrapperNode [2020-10-19 22:11:33,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:33,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:33,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:11:33,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:11:33,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:33,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:11:33,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:11:33,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:11:33,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (1/1) ... [2020-10-19 22:11:33,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:11:33,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:11:33,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:11:33,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:11:33,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (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 22:11:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 22:11:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:11:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:11:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 22:11:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:11:33,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:11:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 22:11:33,499 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:11:33,500 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:11:33,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:33 BoogieIcfgContainer [2020-10-19 22:11:33,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:11:33,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:11:33,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:11:33,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:11:33,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:11:32" (1/3) ... [2020-10-19 22:11:33,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89d895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:33, skipping insertion in model container [2020-10-19 22:11:33,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:33" (2/3) ... [2020-10-19 22:11:33,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89d895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:33, skipping insertion in model container [2020-10-19 22:11:33,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:33" (3/3) ... [2020-10-19 22:11:33,524 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2020-10-19 22:11:33,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:11:33,553 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:11:33,584 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:11:33,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:11:33,614 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:11:33,614 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:11:33,614 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:11:33,614 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:11:33,615 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:11:33,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:11:33,615 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:11:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-19 22:11:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:33,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:33,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:33,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2020-10-19 22:11:33,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:33,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016353173] [2020-10-19 22:11:33,661 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 22:11:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 22:11:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:33,774 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 22:11:33,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:33,781 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 22:11:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016353173] [2020-10-19 22:11:33,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:33,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 22:11:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410535525] [2020-10-19 22:11:33,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:11:33,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:33,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:11:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:33,805 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-19 22:11:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:33,831 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-10-19 22:11:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:11:33,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:11:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:33,841 INFO L225 Difference]: With dead ends: 41 [2020-10-19 22:11:33,842 INFO L226 Difference]: Without dead ends: 18 [2020-10-19 22:11:33,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 22:11:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-19 22:11:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-19 22:11:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 22:11:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-19 22:11:33,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-10-19 22:11:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:33,879 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-19 22:11:33,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:11:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-19 22:11:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:33,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:33,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:34,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 22:11:34,081 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2020-10-19 22:11:34,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:34,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225298572] [2020-10-19 22:11:34,083 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 22:11:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:34,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225298572] [2020-10-19 22:11:34,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:34,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735294258] [2020-10-19 22:11:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:11:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:34,373 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 22:11:34,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:34,393 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 22:11:34,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:34,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-10-19 22:11:34,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768200654] [2020-10-19 22:11:34,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:11:34,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:11:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:11:34,397 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-10-19 22:11:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:34,534 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-19 22:11:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 22:11:34,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-19 22:11:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:34,536 INFO L225 Difference]: With dead ends: 40 [2020-10-19 22:11:34,536 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:11:34,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:11:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-10-19 22:11:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 22:11:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-19 22:11:34,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2020-10-19 22:11:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:34,544 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-19 22:11:34,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:11:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-19 22:11:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:11:34,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:34,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:34,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3 [2020-10-19 22:11:34,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2020-10-19 22:11:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226967480] [2020-10-19 22:11:34,952 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 22:11:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:35,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 22:11:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:35,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226967480] [2020-10-19 22:11:35,063 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:35,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127558073] [2020-10-19 22:11:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 22:11:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:35,277 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 22:11:35,278 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:35,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:35,297 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:35,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:11 [2020-10-19 22:11:35,425 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 0 case distinctions, treesize of input 23 treesize of output 11 [2020-10-19 22:11:35,426 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:35,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:35,466 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:35,467 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:19 [2020-10-19 22:11:35,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:35,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:35,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:11:35,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2020-10-19 22:11:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616518265] [2020-10-19 22:11:35,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 22:11:35,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 22:11:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-19 22:11:35,881 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 7 states. [2020-10-19 22:11:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:36,570 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-19 22:11:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:11:36,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-19 22:11:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:36,572 INFO L225 Difference]: With dead ends: 45 [2020-10-19 22:11:36,572 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 22:11:36,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-10-19 22:11:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 22:11:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2020-10-19 22:11:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 22:11:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-19 22:11:36,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2020-10-19 22:11:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:36,581 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-19 22:11:36,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 22:11:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-19 22:11:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:11:36,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:36,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:36,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:36,998 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash -367867722, now seen corresponding path program 1 times [2020-10-19 22:11:37,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:37,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039109428] [2020-10-19 22:11:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-19 22:11:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 22:11:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:37,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039109428] [2020-10-19 22:11:37,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:37,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1489056636] [2020-10-19 22:11:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 22:11:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:37,382 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 11 treesize of output 7 [2020-10-19 22:11:37,383 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:37,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:37,395 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:37,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-19 22:11:37,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:37,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:37,586 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 14 treesize of output 12 [2020-10-19 22:11:37,592 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 26 treesize of output 24 [2020-10-19 22:11:37,594 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 22:11:37,620 INFO L625 ElimStorePlain]: treesize reduction 13, result has 45.8 percent of original size [2020-10-19 22:11:37,621 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 22:11:37,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:37,630 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 22:11:37,631 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2020-10-19 22:11:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:37,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:37,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-10-19 22:11:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684256099] [2020-10-19 22:11:37,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 22:11:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 22:11:37,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-19 22:11:37,690 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 14 states. [2020-10-19 22:11:42,409 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification that was a NOOP. DAG size: 23 [2020-10-19 22:11:47,002 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 27 [2020-10-19 22:11:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:47,345 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-10-19 22:11:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-19 22:11:47,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-19 22:11:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:47,350 INFO L225 Difference]: With dead ends: 82 [2020-10-19 22:11:47,350 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 22:11:47,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2020-10-19 22:11:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 22:11:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2020-10-19 22:11:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 22:11:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-19 22:11:47,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-19 22:11:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:47,364 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-19 22:11:47,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 22:11:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-19 22:11:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:11:47,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:47,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:47,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:47,780 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash -618305110, now seen corresponding path program 1 times [2020-10-19 22:11:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035185610] [2020-10-19 22:11:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-19 22:11:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:47,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:11:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035185610] [2020-10-19 22:11:47,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62059851] [2020-10-19 22:11:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 22:11:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 22:11:48,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:48,335 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:48,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731442633] [2020-10-19 22:11:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:11:48,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:48,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:48,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:48,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 22:11:48,389 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 22:11:48,389 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:11:49,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:49,036 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 22:11:49,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:11:49 BoogieIcfgContainer [2020-10-19 22:11:49,037 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:11:49,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:11:49,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:11:49,038 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:11:49,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:33" (3/4) ... [2020-10-19 22:11:49,043 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:11:49,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:11:49,045 INFO L168 Benchmark]: Toolchain (without parser) took 16322.69 ms. Allocated memory was 41.4 MB in the beginning and 54.0 MB in the end (delta: 12.6 MB). Free memory was 19.3 MB in the beginning and 21.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,046 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 31.5 MB. Free memory was 7.3 MB in the beginning and 7.3 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.71 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 18.4 MB in the beginning and 17.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 42.5 MB. Free memory was 17.4 MB in the beginning and 15.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,049 INFO L168 Benchmark]: Boogie Preprocessor took 36.29 ms. Allocated memory is still 42.5 MB. Free memory was 15.6 MB in the beginning and 14.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,050 INFO L168 Benchmark]: RCFGBuilder took 377.54 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 13.9 MB in the beginning and 13.0 MB in the end (delta: 888.9 kB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,051 INFO L168 Benchmark]: TraceAbstraction took 15532.39 ms. Allocated memory was 43.5 MB in the beginning and 54.0 MB in the end (delta: 10.5 MB). Free memory was 12.6 MB in the beginning and 22.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 907.2 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,051 INFO L168 Benchmark]: Witness Printer took 6.13 ms. Allocated memory is still 54.0 MB. Free memory was 22.2 MB in the beginning and 21.7 MB in the end (delta: 529.0 kB). Peak memory consumption was 529.0 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:49,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 31.5 MB. Free memory was 7.3 MB in the beginning and 7.3 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 313.71 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 18.4 MB in the beginning and 17.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.65 ms. Allocated memory is still 42.5 MB. Free memory was 17.4 MB in the beginning and 15.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 36.29 ms. Allocated memory is still 42.5 MB. Free memory was 15.6 MB in the beginning and 14.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 377.54 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 13.9 MB in the beginning and 13.0 MB in the end (delta: 888.9 kB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 15532.39 ms. Allocated memory was 43.5 MB in the beginning and 54.0 MB in the end (delta: 10.5 MB). Free memory was 12.6 MB in the beginning and 22.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 907.2 kB. Max. memory is 14.3 GB. * Witness Printer took 6.13 ms. Allocated memory is still 54.0 MB. Free memory was 22.2 MB in the beginning and 21.7 MB in the end (delta: 529.0 kB). Peak memory consumption was 529.0 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int *a = malloc(sizeof(int)*N); [L30] i=0 [L30] COND TRUE i