./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 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_1.5.800.v20200727-1323.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/float-newlib/double_req_bl_0660a.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 351a41b333a03034af243bf6ecb848a7608d7ac0 ...................................................................................................................................................................................................................................................................................................................................... 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_1.5.800.v20200727-1323.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/float-newlib/double_req_bl_0660a.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 351a41b333a03034af243bf6ecb848a7608d7ac0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 00:43:24,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 00:43:24,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 00:43:24,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 00:43:24,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 00:43:24,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 00:43:24,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 00:43:24,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 00:43:24,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 00:43:24,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 00:43:24,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 00:43:24,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 00:43:24,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 00:43:24,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 00:43:24,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 00:43:24,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 00:43:24,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 00:43:24,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 00:43:24,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 00:43:24,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 00:43:24,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 00:43:24,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 00:43:24,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 00:43:24,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 00:43:24,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 00:43:24,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 00:43:24,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 00:43:24,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 00:43:24,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 00:43:24,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 00:43:24,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 00:43:24,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 00:43:24,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 00:43:24,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 00:43:24,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 00:43:24,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 00:43:24,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 00:43:24,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 00:43:24,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 00:43:24,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 00:43:24,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 00:43:24,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 00:43:24,823 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 00:43:24,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 00:43:24,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 00:43:24,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 00:43:24,829 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 00:43:24,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 00:43:24,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 00:43:24,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 00:43:24,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 00:43:24,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 00:43:24,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 00:43:24,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 00:43:24,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 00:43:24,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 00:43:24,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 00:43:24,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 00:43:24,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 00:43:24,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 00:43:24,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 00:43:24,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 00:43:24,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 00:43:24,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 00:43:24,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 00:43:24,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 00:43:24,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 00:43:24,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 00:43:24,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 00:43:24,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 00:43:24,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 351a41b333a03034af243bf6ecb848a7608d7ac0 [2020-12-03 00:43:25,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 00:43:25,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 00:43:25,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 00:43:25,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 00:43:25,306 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 00:43:25,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-03 00:43:25,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a7f7cb4/2940da58e2654d4eaf520b460f4ff839/FLAGca37c0c65 [2020-12-03 00:43:26,145 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 00:43:26,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-03 00:43:26,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a7f7cb4/2940da58e2654d4eaf520b460f4ff839/FLAGca37c0c65 [2020-12-03 00:43:26,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15a7f7cb4/2940da58e2654d4eaf520b460f4ff839 [2020-12-03 00:43:26,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 00:43:26,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 00:43:26,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 00:43:26,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 00:43:26,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 00:43:26,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:43:26" (1/1) ... [2020-12-03 00:43:26,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5d60c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:26, skipping insertion in model container [2020-12-03 00:43:26,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:43:26" (1/1) ... [2020-12-03 00:43:26,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 00:43:26,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 00:43:26,826 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-03 00:43:26,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 00:43:26,854 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 00:43:26,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-03 00:43:26,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 00:43:27,038 INFO L208 MainTranslator]: Completed translation [2020-12-03 00:43:27,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27 WrapperNode [2020-12-03 00:43:27,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 00:43:27,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 00:43:27,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 00:43:27,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 00:43:27,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 00:43:27,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 00:43:27,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 00:43:27,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 00:43:27,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (1/1) ... [2020-12-03 00:43:27,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 00:43:27,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 00:43:27,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 00:43:27,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 00:43:27,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (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 [2020-12-03 00:43:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 00:43:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 00:43:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-03 00:43:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 00:43:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-03 00:43:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 00:43:27,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 00:43:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 00:43:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-03 00:43:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 00:43:28,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 00:43:28,242 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2020-12-03 00:43:28,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:43:28 BoogieIcfgContainer [2020-12-03 00:43:28,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 00:43:28,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 00:43:28,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 00:43:28,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 00:43:28,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:43:26" (1/3) ... [2020-12-03 00:43:28,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3167b3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:43:28, skipping insertion in model container [2020-12-03 00:43:28,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:27" (2/3) ... [2020-12-03 00:43:28,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3167b3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:43:28, skipping insertion in model container [2020-12-03 00:43:28,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:43:28" (3/3) ... [2020-12-03 00:43:28,254 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0660a.c [2020-12-03 00:43:28,270 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 00:43:28,274 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 00:43:28,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 00:43:28,315 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 00:43:28,316 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 00:43:28,316 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 00:43:28,316 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 00:43:28,316 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 00:43:28,317 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 00:43:28,317 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 00:43:28,317 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 00:43:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-12-03 00:43:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 00:43:28,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:43:28,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:43:28,343 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:43:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:43:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1059427896, now seen corresponding path program 1 times [2020-12-03 00:43:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 00:43:28,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993884939] [2020-12-03 00:43:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 00:43:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:43:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:43:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993884939] [2020-12-03 00:43:28,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:43:28,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 00:43:28,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955239460] [2020-12-03 00:43:28,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 00:43:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 00:43:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 00:43:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 00:43:28,642 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 2 states. [2020-12-03 00:43:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:43:28,678 INFO L93 Difference]: Finished difference Result 227 states and 382 transitions. [2020-12-03 00:43:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 00:43:28,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-03 00:43:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:43:28,697 INFO L225 Difference]: With dead ends: 227 [2020-12-03 00:43:28,698 INFO L226 Difference]: Without dead ends: 111 [2020-12-03 00:43:28,702 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 [2020-12-03 00:43:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-03 00:43:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-03 00:43:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-03 00:43:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-12-03 00:43:28,749 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 11 [2020-12-03 00:43:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:43:28,750 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-12-03 00:43:28,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 00:43:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-12-03 00:43:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 00:43:28,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:43:28,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:43:28,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 00:43:28,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:43:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:43:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -7417919, now seen corresponding path program 1 times [2020-12-03 00:43:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 00:43:28,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9106236] [2020-12-03 00:43:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 00:43:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 00:43:28,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 00:43:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 00:43:28,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 00:43:29,025 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-03 00:43:29,026 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 00:43:29,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 00:43:29,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:43:29 BoogieIcfgContainer [2020-12-03 00:43:29,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 00:43:29,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 00:43:29,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 00:43:29,072 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 00:43:29,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:43:28" (3/4) ... [2020-12-03 00:43:29,079 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 00:43:29,080 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 00:43:29,082 INFO L168 Benchmark]: Toolchain (without parser) took 2614.16 ms. Allocated memory was 41.9 MB in the beginning and 67.1 MB in the end (delta: 25.2 MB). Free memory was 19.6 MB in the beginning and 42.2 MB in the end (delta: -22.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,083 INFO L168 Benchmark]: CDTParser took 0.88 ms. Allocated memory is still 41.9 MB. Free memory was 22.7 MB in the beginning and 22.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 00:43:29,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.19 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 19.3 MB in the beginning and 37.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,085 INFO L168 Benchmark]: Boogie Procedure Inliner took 99.16 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 34.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,086 INFO L168 Benchmark]: Boogie Preprocessor took 63.85 ms. Allocated memory is still 54.5 MB. Free memory was 34.3 MB in the beginning and 31.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,087 INFO L168 Benchmark]: RCFGBuilder took 1038.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.1 MB in the beginning and 33.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,088 INFO L168 Benchmark]: TraceAbstraction took 825.36 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 33.1 MB in the beginning and 42.5 MB in the end (delta: -9.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2020-12-03 00:43:29,089 INFO L168 Benchmark]: Witness Printer took 8.02 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 42.2 MB in the end (delta: 362.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 00:43:29,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.88 ms. Allocated memory is still 41.9 MB. Free memory was 22.7 MB in the beginning and 22.7 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 571.19 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 19.3 MB in the beginning and 37.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 99.16 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 34.3 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.85 ms. Allocated memory is still 54.5 MB. Free memory was 34.3 MB in the beginning and 31.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1038.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.1 MB in the beginning and 33.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 825.36 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 33.1 MB in the beginning and 42.5 MB in the end (delta: -9.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Witness Printer took 8.02 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 42.2 MB in the end (delta: 362.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 261]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 164, overapproximation of someUnaryDOUBLEoperation at line 253, overapproximation of bitwiseAnd at line 162, overapproximation of someBinaryArithmeticDOUBLEoperation at line 165, overapproximation of someBinaryDOUBLEComparisonOperation at line 260. Possible FailurePath: [L39-L44] static const double atanhi_atan[] = { 4.63647609000806093515e-01, 7.85398163397448278999e-01, 9.82793723247329054082e-01, 1.57079632679489655800e+00, }; [L46-L51] static const double atanlo_atan[] = { 2.26987774529616870924e-17, 3.06161699786838301793e-17, 1.39033110312309984516e-17, 6.12323399573676603587e-17, }; [L53-L60] static const double aT_atan[] = { 3.33333333333329318027e-01, -1.99999999998764832476e-01, 1.42857142725034663711e-01, -1.11111104054623557880e-01, 9.09088713343650656196e-02, -7.69187620504482999495e-02, 6.66107313738753120669e-02, -5.83357013379057348645e-02, 4.97687799461593236017e-02, -3.65315727442169155270e-02, 1.62858201153657823623e-02, }; [L62-L64] static const double one_atan = 1.0, pi_o_4 = 7.8539816339744827900E-01, pi_o_2 = 1.5707963267948965580E+00, pi = 3.1415926535897931160E+00, huge_atan = 1.0e300; [L141-L142] static const double tiny_atan2 = 1.0e-300, zero_atan2 = 0.0, pi_lo_atan2 = 1.2246467991473531772E-16; VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L252] double x = __VERIFIER_nondet_double(); [L253] double y = -0.0; VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L255] COND TRUE x < 0.0 [L145] double z; [L146] __int32_t k, m, hx, hy, ix, iy; [L147] __uint32_t lx, ly; VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L150] ieee_double_shape_type ew_u; [L151] ew_u.value = (x) [L152] EXPR ew_u.parts.msw [L152] (hx) = ew_u.parts.msw [L153] EXPR ew_u.parts.lsw [L153] (lx) = ew_u.parts.lsw [L155] ix = hx & 0x7fffffff VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L157] ieee_double_shape_type ew_u; [L158] ew_u.value = (y) [L159] EXPR ew_u.parts.msw [L159] (hy) = ew_u.parts.msw [L160] EXPR ew_u.parts.lsw [L160] (ly) = ew_u.parts.lsw [L162] iy = hy & 0x7fffffff VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L163-L164] COND TRUE ((ix | ((lx | -lx) >> 31)) > 0x7ff00000) || ((iy | ((ly | -ly) >> 31)) > 0x7ff00000) [L165] return x + y; VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L257] double res = __ieee754_atan2(y, x); [L260] COND TRUE res != -pi VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] [L261] reach_error() VAL [aT_atan={7:0}, atanhi_atan={11:0}, atanlo_atan={10:0}, huge_atan=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, one_atan=1, pi=785398163397448279/250000000000000000, pi_lo_atan2=3061616997868382943/25000000000000000000000000000000000, pi_o_2=785398163397448279/500000000000000000, pi_o_4=785398163397448279/1000000000000000000, tiny_atan2=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, zero_atan2=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 115 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 00:43:31,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 00:43:31,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 00:43:31,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-03 00:43:31,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 00:43:31,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 00:43:31,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 00:43:31,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 00:43:31,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 00:43:31,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 00:43:31,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 00:43:31,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 00:43:31,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 00:43:31,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 00:43:31,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 00:43:31,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 00:43:31,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 00:43:31,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 00:43:31,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 00:43:31,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 00:43:31,800 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 00:43:31,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 00:43:31,800 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 00:43:31,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 00:43:31,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 00:43:31,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 00:43:31,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 00:43:31,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 00:43:31,803 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 00:43:31,803 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 00:43:31,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 00:43:31,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 00:43:31,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 00:43:31,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 00:43:31,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 00:43:31,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 00:43:31,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 00:43:31,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 00:43:31,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 00:43:31,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 00:43:31,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 00:43:31,806 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 00:43:31,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 00:43:31,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 00:43:31,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 00:43:31,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 00:43:31,807 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 351a41b333a03034af243bf6ecb848a7608d7ac0 [2020-12-03 00:43:32,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 00:43:32,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 00:43:32,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 00:43:32,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 00:43:32,257 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 00:43:32,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-03 00:43:32,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61590fa86/0add26fe00ce4c41a28126fc3e069080/FLAGf4f540782 [2020-12-03 00:43:33,066 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 00:43:33,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c [2020-12-03 00:43:33,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61590fa86/0add26fe00ce4c41a28126fc3e069080/FLAGf4f540782 [2020-12-03 00:43:33,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61590fa86/0add26fe00ce4c41a28126fc3e069080 [2020-12-03 00:43:33,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 00:43:33,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 00:43:33,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 00:43:33,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 00:43:33,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 00:43:33,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:33,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202f5b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33, skipping insertion in model container [2020-12-03 00:43:33,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:33,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 00:43:33,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 00:43:33,784 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-03 00:43:33,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 00:43:33,804 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 00:43:33,881 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_0660a.c[6214,6227] [2020-12-03 00:43:33,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 00:43:33,913 INFO L208 MainTranslator]: Completed translation [2020-12-03 00:43:33,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33 WrapperNode [2020-12-03 00:43:33,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 00:43:33,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 00:43:33,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 00:43:33,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 00:43:33,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:33,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 00:43:34,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 00:43:34,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 00:43:34,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 00:43:34,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (1/1) ... [2020-12-03 00:43:34,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 00:43:34,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 00:43:34,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 00:43:34,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 00:43:34,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (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 [2020-12-03 00:43:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-03 00:43:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-03 00:43:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 00:43:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 00:43:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2020-12-03 00:43:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-03 00:43:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 00:43:34,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 00:43:34,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-03 00:43:34,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 00:44:23,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 00:44:23,565 INFO L299 CfgBuilder]: Removed 44 assume(true) statements. [2020-12-03 00:44:23,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:44:23 BoogieIcfgContainer [2020-12-03 00:44:23,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 00:44:23,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 00:44:23,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 00:44:23,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 00:44:23,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:43:33" (1/3) ... [2020-12-03 00:44:23,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d061fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:44:23, skipping insertion in model container [2020-12-03 00:44:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:43:33" (2/3) ... [2020-12-03 00:44:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d061fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:44:23, skipping insertion in model container [2020-12-03 00:44:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:44:23" (3/3) ... [2020-12-03 00:44:23,577 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_0660a.c [2020-12-03 00:44:23,594 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 00:44:23,600 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 00:44:23,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 00:44:23,662 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 00:44:23,663 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 00:44:23,663 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 00:44:23,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 00:44:23,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 00:44:23,664 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 00:44:23,664 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 00:44:23,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 00:44:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-12-03 00:44:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 00:44:23,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:44:23,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:44:23,710 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:44:23,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:44:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1059427896, now seen corresponding path program 1 times [2020-12-03 00:44:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:44:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857158217] [2020-12-03 00:44:23,755 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 [2020-12-03 00:44:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:44:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 00:44:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:44:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:44:24,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:44:24,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857158217] [2020-12-03 00:44:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:44:24,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 00:44:24,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937094823] [2020-12-03 00:44:24,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 00:44:24,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:44:24,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 00:44:24,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 00:44:24,320 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 2 states. [2020-12-03 00:44:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:44:24,355 INFO L93 Difference]: Finished difference Result 227 states and 382 transitions. [2020-12-03 00:44:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 00:44:24,357 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-03 00:44:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:44:24,371 INFO L225 Difference]: With dead ends: 227 [2020-12-03 00:44:24,371 INFO L226 Difference]: Without dead ends: 111 [2020-12-03 00:44:24,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 00:44:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-03 00:44:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-03 00:44:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-03 00:44:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-12-03 00:44:24,428 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 11 [2020-12-03 00:44:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:44:24,429 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-12-03 00:44:24,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 00:44:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-12-03 00:44:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 00:44:24,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:44:24,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:44:24,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 00:44:24,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:44:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:44:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash -7417919, now seen corresponding path program 1 times [2020-12-03 00:44:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:44:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657846068] [2020-12-03 00:44:24,649 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 [2020-12-03 00:44:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:44:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 00:44:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:44:25,538 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:44:25,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-12-03 00:44:25,919 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 00:44:26,271 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 00:44:26,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:44:26,279 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-03 00:44:26,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:44 [2020-12-03 00:44:26,667 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 00:44:27,157 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 00:44:27,271 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:44:27,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2020-12-03 00:44:27,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 00:44:27,616 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 00:44:27,616 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:44:27,619 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-03 00:44:27,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:34 [2020-12-03 00:44:28,284 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 00:44:28,972 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-03 00:44:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:44:28,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:44:28,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657846068] [2020-12-03 00:44:28,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:44:28,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-03 00:44:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463031888] [2020-12-03 00:44:28,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 00:44:28,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:44:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 00:44:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-03 00:44:29,001 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand 8 states. [2020-12-03 00:44:30,041 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-12-03 00:44:30,937 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:44:31,530 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-03 00:44:32,414 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 00:44:33,062 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 00:44:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:44:59,879 INFO L93 Difference]: Finished difference Result 176 states and 244 transitions. [2020-12-03 00:44:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 00:44:59,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-03 00:44:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:44:59,964 INFO L225 Difference]: With dead ends: 176 [2020-12-03 00:44:59,964 INFO L226 Difference]: Without dead ends: 117 [2020-12-03 00:44:59,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-03 00:44:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-03 00:44:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-12-03 00:44:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-03 00:44:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2020-12-03 00:44:59,989 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 13 [2020-12-03 00:44:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:44:59,989 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2020-12-03 00:44:59,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 00:44:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2020-12-03 00:44:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 00:44:59,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:44:59,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:45:00,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 00:45:00,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:45:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:45:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1171723193, now seen corresponding path program 1 times [2020-12-03 00:45:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:45:00,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596799452] [2020-12-03 00:45:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 00:45:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:45:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 00:45:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:45:01,325 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:45:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:45:01,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:45:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596799452] [2020-12-03 00:45:01,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:45:01,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:45:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516792565] [2020-12-03 00:45:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:45:01,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:45:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:45:01,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 00:45:01,698 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand 7 states. [2020-12-03 00:45:02,065 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:45:02,441 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:45:02,957 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:45:03,326 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-03 00:45:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:45:07,163 INFO L93 Difference]: Finished difference Result 184 states and 248 transitions. [2020-12-03 00:45:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 00:45:07,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-03 00:45:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:45:07,166 INFO L225 Difference]: With dead ends: 184 [2020-12-03 00:45:07,166 INFO L226 Difference]: Without dead ends: 121 [2020-12-03 00:45:07,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-03 00:45:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-03 00:45:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2020-12-03 00:45:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-03 00:45:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2020-12-03 00:45:07,184 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 18 [2020-12-03 00:45:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:45:07,185 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2020-12-03 00:45:07,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:45:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2020-12-03 00:45:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 00:45:07,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:45:07,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:45:07,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 00:45:07,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:45:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:45:07,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1114464891, now seen corresponding path program 1 times [2020-12-03 00:45:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:45:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961264061] [2020-12-03 00:45:07,393 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 [2020-12-03 00:45:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:45:07,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 00:45:07,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:45:11,112 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-03 00:45:11,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:45:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:45:11,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:45:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961264061] [2020-12-03 00:45:11,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:45:11,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:45:11,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224790711] [2020-12-03 00:45:11,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:45:11,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:45:11,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:45:11,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2020-12-03 00:45:11,523 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand 7 states. [2020-12-03 00:45:13,920 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 00:45:14,457 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 00:45:16,810 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-03 00:45:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:45:21,169 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2020-12-03 00:45:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 00:45:21,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-03 00:45:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:45:21,172 INFO L225 Difference]: With dead ends: 121 [2020-12-03 00:45:21,172 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:45:21,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=32, Invalid=57, Unknown=1, NotChecked=0, Total=90 [2020-12-03 00:45:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:45:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-03 00:45:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 00:45:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2020-12-03 00:45:21,196 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 18 [2020-12-03 00:45:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:45:21,196 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2020-12-03 00:45:21,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:45:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2020-12-03 00:45:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 00:45:21,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:45:21,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:45:21,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 00:45:21,401 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:45:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:45:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash -960415812, now seen corresponding path program 1 times [2020-12-03 00:45:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:45:21,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881622113] [2020-12-03 00:45:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 00:45:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:45:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 00:45:21,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:45:22,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:45:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:45:22,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:45:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881622113] [2020-12-03 00:45:22,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:45:22,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:45:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958445673] [2020-12-03 00:45:22,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:45:22,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:45:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:45:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 00:45:22,848 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 7 states. [2020-12-03 00:45:23,222 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:45:23,600 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:45:24,060 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:45:24,618 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-03 00:45:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:45:28,448 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-03 00:45:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 00:45:28,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-03 00:45:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:45:28,450 INFO L225 Difference]: With dead ends: 95 [2020-12-03 00:45:28,450 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:45:28,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-03 00:45:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:45:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-03 00:45:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 00:45:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2020-12-03 00:45:28,460 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 19 [2020-12-03 00:45:28,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:45:28,461 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2020-12-03 00:45:28,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:45:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2020-12-03 00:45:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 00:45:28,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:45:28,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:45:28,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 00:45:28,663 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:45:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:45:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash 286843778, now seen corresponding path program 1 times [2020-12-03 00:45:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:45:28,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674870363] [2020-12-03 00:45:28,666 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 [2020-12-03 00:45:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:45:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 00:45:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:45:34,989 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-12-03 00:45:34,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:45:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:45:35,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:45:35,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674870363] [2020-12-03 00:45:35,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:45:35,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:45:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989449199] [2020-12-03 00:45:35,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:45:35,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:45:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:45:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=27, Unknown=2, NotChecked=0, Total=42 [2020-12-03 00:45:35,331 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand 7 states. [2020-12-03 00:45:36,009 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 00:45:36,577 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 00:45:39,058 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-03 00:45:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:45:43,402 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-12-03 00:45:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 00:45:43,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-03 00:45:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:45:43,404 INFO L225 Difference]: With dead ends: 95 [2020-12-03 00:45:43,404 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:45:43,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=32, Invalid=56, Unknown=2, NotChecked=0, Total=90 [2020-12-03 00:45:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:45:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-03 00:45:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 00:45:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-12-03 00:45:43,420 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 20 [2020-12-03 00:45:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:45:43,420 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-12-03 00:45:43,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:45:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-12-03 00:45:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 00:45:43,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:45:43,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:45:43,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 00:45:43,637 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:45:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:45:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1774047840, now seen corresponding path program 1 times [2020-12-03 00:45:43,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:45:43,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70383478] [2020-12-03 00:45:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 00:45:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:45:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 00:45:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:45:44,248 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 00:45:44,877 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 00:45:46,206 WARN L197 SmtUtils]: Spent 972.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 00:45:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:45:46,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:45:46,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70383478] [2020-12-03 00:45:46,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:45:46,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 00:45:46,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674624559] [2020-12-03 00:45:46,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 00:45:46,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:45:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 00:45:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 00:45:46,213 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 5 states. [2020-12-03 00:45:54,332 WARN L197 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2020-12-03 00:45:56,784 WARN L197 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-12-03 00:46:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:46:28,738 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2020-12-03 00:46:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 00:46:28,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-03 00:46:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:46:28,955 INFO L225 Difference]: With dead ends: 95 [2020-12-03 00:46:28,955 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:46:28,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 00:46:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:46:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-03 00:46:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 00:46:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-12-03 00:46:28,961 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 20 [2020-12-03 00:46:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:46:28,962 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-12-03 00:46:28,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 00:46:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-12-03 00:46:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-03 00:46:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:46:28,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:46:29,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 00:46:29,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:46:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:46:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1297758981, now seen corresponding path program 1 times [2020-12-03 00:46:29,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:46:29,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836593788] [2020-12-03 00:46:29,175 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 [2020-12-03 00:46:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:46:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 00:46:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:46:30,483 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-03 00:46:30,911 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 00:46:31,734 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 00:46:32,759 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 00:46:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:46:32,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:46:32,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836593788] [2020-12-03 00:46:32,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:46:32,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-03 00:46:32,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836371613] [2020-12-03 00:46:32,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 00:46:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:46:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 00:46:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-03 00:46:32,774 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 8 states. [2020-12-03 00:46:33,968 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:46:34,538 WARN L197 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-03 00:46:35,033 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 00:46:35,571 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 00:46:36,897 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 00:46:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:46:39,662 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-12-03 00:46:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 00:46:39,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-03 00:46:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:46:39,932 INFO L225 Difference]: With dead ends: 106 [2020-12-03 00:46:39,933 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:46:39,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-03 00:46:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:46:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2020-12-03 00:46:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 00:46:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-12-03 00:46:39,939 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 21 [2020-12-03 00:46:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:46:39,939 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-12-03 00:46:39,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 00:46:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-12-03 00:46:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-03 00:46:39,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:46:39,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:46:40,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 00:46:40,142 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:46:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:46:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -804510387, now seen corresponding path program 1 times [2020-12-03 00:46:40,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:46:40,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352921112] [2020-12-03 00:46:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-03 00:46:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:46:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 00:46:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:46:41,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:46:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:46:41,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:46:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352921112] [2020-12-03 00:46:41,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:46:41,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:46:41,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503644641] [2020-12-03 00:46:41,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:46:41,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:46:41,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:46:41,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 00:46:41,820 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 7 states. [2020-12-03 00:46:42,239 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:46:42,637 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:46:43,159 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:46:46,797 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-03 00:46:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:46:51,124 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-12-03 00:46:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 00:46:51,124 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-03 00:46:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:46:51,125 INFO L225 Difference]: With dead ends: 95 [2020-12-03 00:46:51,125 INFO L226 Difference]: Without dead ends: 91 [2020-12-03 00:46:51,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-03 00:46:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-03 00:46:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-12-03 00:46:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-03 00:46:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2020-12-03 00:46:51,131 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 22 [2020-12-03 00:46:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:46:51,131 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-12-03 00:46:51,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:46:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2020-12-03 00:46:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 00:46:51,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:46:51,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:46:51,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 00:46:51,343 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:46:51,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:46:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 111855477, now seen corresponding path program 1 times [2020-12-03 00:46:51,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:46:51,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280894829] [2020-12-03 00:46:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-03 00:46:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:46:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 00:46:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:46:52,099 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 00:46:52,460 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 00:46:53,161 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-03 00:46:53,829 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-03 00:46:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:46:53,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:46:53,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280894829] [2020-12-03 00:46:53,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:46:53,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 00:46:53,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075808634] [2020-12-03 00:46:53,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 00:46:53,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:46:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 00:46:53,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 00:46:53,839 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 6 states. [2020-12-03 00:46:59,608 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-03 00:47:02,121 WARN L197 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-03 00:47:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:47:32,679 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-12-03 00:47:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 00:47:32,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-03 00:47:32,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:47:32,732 INFO L225 Difference]: With dead ends: 99 [2020-12-03 00:47:32,732 INFO L226 Difference]: Without dead ends: 95 [2020-12-03 00:47:32,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-03 00:47:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-03 00:47:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2020-12-03 00:47:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-03 00:47:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2020-12-03 00:47:32,741 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 25 [2020-12-03 00:47:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:47:32,742 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2020-12-03 00:47:32,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 00:47:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2020-12-03 00:47:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-03 00:47:32,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:47:32,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:47:32,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-03 00:47:32,956 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:47:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:47:32,957 INFO L82 PathProgramCache]: Analyzing trace with hash -825662492, now seen corresponding path program 1 times [2020-12-03 00:47:32,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:47:32,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764849907] [2020-12-03 00:47:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-03 00:47:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:47:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 00:47:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:47:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:47:33,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:47:33,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764849907] [2020-12-03 00:47:33,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:47:33,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 00:47:33,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835976233] [2020-12-03 00:47:33,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 00:47:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:47:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 00:47:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 00:47:33,431 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand 3 states. [2020-12-03 00:47:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:47:35,464 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-12-03 00:47:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 00:47:35,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-03 00:47:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:47:35,498 INFO L225 Difference]: With dead ends: 85 [2020-12-03 00:47:35,498 INFO L226 Difference]: Without dead ends: 78 [2020-12-03 00:47:35,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 00:47:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-03 00:47:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-03 00:47:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-03 00:47:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-12-03 00:47:35,502 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 26 [2020-12-03 00:47:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:47:35,502 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-12-03 00:47:35,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 00:47:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-12-03 00:47:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-03 00:47:35,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:47:35,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:47:35,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-03 00:47:35,714 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:47:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:47:35,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1286513403, now seen corresponding path program 1 times [2020-12-03 00:47:35,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:47:35,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375969013] [2020-12-03 00:47:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-03 00:47:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:47:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 00:47:36,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:47:38,358 WARN L197 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-03 00:47:38,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:47:38,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:47:38,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 00:47:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:47:38,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:47:38,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375969013] [2020-12-03 00:47:38,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:47:38,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-03 00:47:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336776357] [2020-12-03 00:47:38,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 00:47:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:47:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 00:47:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-03 00:47:38,824 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 9 states. [2020-12-03 00:47:39,333 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:47:39,923 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:47:40,588 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:47:41,999 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-12-03 00:47:45,721 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-03 00:47:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:47:52,244 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-12-03 00:47:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 00:47:52,286 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-03 00:47:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:47:52,287 INFO L225 Difference]: With dead ends: 87 [2020-12-03 00:47:52,287 INFO L226 Difference]: Without dead ends: 75 [2020-12-03 00:47:52,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-12-03 00:47:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-03 00:47:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-03 00:47:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-03 00:47:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2020-12-03 00:47:52,290 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 28 [2020-12-03 00:47:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:47:52,291 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2020-12-03 00:47:52,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 00:47:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2020-12-03 00:47:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-03 00:47:52,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:47:52,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:47:52,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-03 00:47:52,502 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:47:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:47:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash -490549731, now seen corresponding path program 1 times [2020-12-03 00:47:52,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:47:52,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281944666] [2020-12-03 00:47:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-03 00:47:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:47:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 00:47:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:47:54,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 00:47:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:47:54,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:47:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281944666] [2020-12-03 00:47:54,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:47:54,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 00:47:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186777397] [2020-12-03 00:47:54,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 00:47:54,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:47:54,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 00:47:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 00:47:54,991 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 7 states. [2020-12-03 00:47:55,430 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-03 00:47:55,815 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:47:56,281 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 00:48:00,092 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 00:48:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 00:48:02,691 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-12-03 00:48:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 00:48:02,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-12-03 00:48:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 00:48:02,730 INFO L225 Difference]: With dead ends: 79 [2020-12-03 00:48:02,730 INFO L226 Difference]: Without dead ends: 75 [2020-12-03 00:48:02,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-03 00:48:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-03 00:48:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-03 00:48:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-03 00:48:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-12-03 00:48:02,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 36 [2020-12-03 00:48:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 00:48:02,735 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-12-03 00:48:02,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 00:48:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-12-03 00:48:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-03 00:48:02,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 00:48:02,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 00:48:02,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-03 00:48:02,943 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 00:48:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 00:48:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1125012315, now seen corresponding path program 1 times [2020-12-03 00:48:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 00:48:02,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098525168] [2020-12-03 00:48:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-03 00:48:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 00:48:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-03 00:48:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 00:48:04,559 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 00:48:04,900 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-03 00:48:05,294 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-03 00:48:06,202 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 00:48:07,172 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-03 00:48:07,346 INFO L382 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 14 treesize of output 10 [2020-12-03 00:48:07,349 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-03 00:48:07,779 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-03 00:48:07,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:48:07,782 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-03 00:48:07,783 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:80, output treesize:76 [2020-12-03 00:48:08,933 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 00:48:10,111 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 00:48:11,373 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 00:48:11,494 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:48:11,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 22 [2020-12-03 00:48:11,496 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-03 00:48:11,962 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 00:48:11,963 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-03 00:48:11,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-03 00:48:11,964 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:89, output treesize:64 [2020-12-03 00:48:13,748 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-03 00:48:15,491 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-03 00:48:17,494 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-12-03 00:48:19,438 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-03 00:48:21,685 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-03 00:48:33,773 WARN L197 SmtUtils]: Spent 3.90 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-03 00:48:51,629 WARN L197 SmtUtils]: Spent 3.45 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-03 00:48:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 00:48:52,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 00:48:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098525168] [2020-12-03 00:48:52,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 00:48:52,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-03 00:48:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785177589] [2020-12-03 00:48:52,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-03 00:48:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 00:48:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-03 00:48:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2020-12-03 00:48:52,349 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 17 states. [2020-12-03 00:48:57,721 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 00:49:05,113 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 00:49:08,348 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-03 00:49:11,503 WARN L197 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-03 00:49:15,098 WARN L197 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-03 00:49:22,096 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-03 00:49:30,210 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-03 00:49:34,801 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-03 00:49:35,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-12-03 00:49:35,004 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:759) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 31 more [2020-12-03 00:49:35,012 INFO L168 Benchmark]: Toolchain (without parser) took 361587.33 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.8 MB in the beginning and 19.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 16.9 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,012 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 24.6 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 00:49:35,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 482.90 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.6 MB in the beginning and 36.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,013 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.92 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 33.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,014 INFO L168 Benchmark]: Boogie Preprocessor took 81.91 ms. Allocated memory is still 54.5 MB. Free memory was 33.1 MB in the beginning and 29.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,014 INFO L168 Benchmark]: RCFGBuilder took 49483.55 ms. Allocated memory is still 54.5 MB. Free memory was 29.4 MB in the beginning and 32.8 MB in the end (delta: -3.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,015 INFO L168 Benchmark]: TraceAbstraction took 311442.04 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 19.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-12-03 00:49:35,018 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 44.0 MB. Free memory was 24.6 MB in the beginning and 24.6 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 482.90 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.6 MB in the beginning and 36.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.92 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 33.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.91 ms. Allocated memory is still 54.5 MB. Free memory was 33.1 MB in the beginning and 29.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 49483.55 ms. Allocated memory is still 54.5 MB. Free memory was 29.4 MB in the beginning and 32.8 MB in the end (delta: -3.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 311442.04 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 19.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...