./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 88b5e43d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 1a552001c735a44e7c5826cbc850fdca20f73d60 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 1a552001c735a44e7c5826cbc850fdca20f73d60 ....................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-88b5e43 [2020-11-23 23:19:30,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-23 23:19:30,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-23 23:19:30,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-23 23:19:30,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-23 23:19:30,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-23 23:19:30,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-23 23:19:30,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-23 23:19:30,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-23 23:19:30,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-23 23:19:30,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-23 23:19:30,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-23 23:19:30,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-23 23:19:30,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-23 23:19:30,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-23 23:19:30,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-23 23:19:30,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-23 23:19:30,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-23 23:19:30,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-23 23:19:30,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-23 23:19:30,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-23 23:19:30,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-23 23:19:30,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-23 23:19:30,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-23 23:19:30,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-23 23:19:30,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-23 23:19:30,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-23 23:19:30,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-23 23:19:30,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-23 23:19:30,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-23 23:19:30,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-23 23:19:30,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-23 23:19:30,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-23 23:19:30,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-23 23:19:30,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-23 23:19:30,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-23 23:19:30,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-23 23:19:30,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-23 23:19:30,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-23 23:19:30,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-23 23:19:30,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-23 23:19:30,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-23 23:19:30,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-23 23:19:30,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-23 23:19:30,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-23 23:19:30,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-23 23:19:30,409 INFO L138 SettingsManager]: * Use SBE=true [2020-11-23 23:19:30,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-23 23:19:30,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-23 23:19:30,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-23 23:19:30,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-23 23:19:30,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-23 23:19:30,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-23 23:19:30,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-23 23:19:30,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-23 23:19:30,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-23 23:19:30,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-23 23:19:30,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-23 23:19:30,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-23 23:19:30,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-23 23:19:30,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-23 23:19:30,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-23 23:19:30,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-23 23:19:30,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-23 23:19:30,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-23 23:19:30,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-23 23:19:30,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-23 23:19:30,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-23 23:19:30,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-23 23:19:30,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-23 23:19:30,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-23 23:19:30,417 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a552001c735a44e7c5826cbc850fdca20f73d60 [2020-11-23 23:19:30,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-23 23:19:30,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-23 23:19:30,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-23 23:19:30,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-23 23:19:30,830 INFO L275 PluginConnector]: CDTParser initialized [2020-11-23 23:19:30,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:30,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9553cfc25/b49bdc8093c043c99a011d291e989ae6/FLAG860fe9cb3 [2020-11-23 23:19:31,509 INFO L306 CDTParser]: Found 1 translation units. [2020-11-23 23:19:31,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:31,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9553cfc25/b49bdc8093c043c99a011d291e989ae6/FLAG860fe9cb3 [2020-11-23 23:19:31,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9553cfc25/b49bdc8093c043c99a011d291e989ae6 [2020-11-23 23:19:31,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-23 23:19:31,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-23 23:19:31,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-23 23:19:31,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-23 23:19:31,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-23 23:19:31,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:31" (1/1) ... [2020-11-23 23:19:31,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6f61bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:31, skipping insertion in model container [2020-11-23 23:19:31,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:31" (1/1) ... [2020-11-23 23:19:31,952 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-11-23 23:19:31,973 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-11-23 23:19:32,234 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-11-23 23:19:32,245 INFO L212 MainTranslator]: Completed pre-run [2020-11-23 23:19:32,262 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-11-23 23:19:32,278 INFO L217 MainTranslator]: Completed translation [2020-11-23 23:19:32,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32 WrapperNode [2020-11-23 23:19:32,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-23 23:19:32,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-23 23:19:32,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-23 23:19:32,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-23 23:19:32,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-23 23:19:32,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-23 23:19:32,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-23 23:19:32,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-23 23:19:32,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... [2020-11-23 23:19:32,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-23 23:19:32,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-23 23:19:32,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-23 23:19:32,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-23 23:19:32,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-11-23 23:19:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-23 23:19:32,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-23 23:19:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-23 23:19:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-23 23:19:32,630 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-23 23:19:32,630 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-23 23:19:32,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:32 BoogieIcfgContainer [2020-11-23 23:19:32,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-23 23:19:32,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-23 23:19:32,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-23 23:19:32,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-23 23:19:32,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:19:31" (1/3) ... [2020-11-23 23:19:32,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d952efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:32, skipping insertion in model container [2020-11-23 23:19:32,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:32" (2/3) ... [2020-11-23 23:19:32,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d952efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:32, skipping insertion in model container [2020-11-23 23:19:32,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:32" (3/3) ... [2020-11-23 23:19:32,641 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:32,654 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-23 23:19:32,659 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-23 23:19:32,674 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-23 23:19:32,721 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-23 23:19:32,721 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-23 23:19:32,724 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-23 23:19:32,727 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-23 23:19:32,727 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-23 23:19:32,728 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-23 23:19:32,728 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-23 23:19:32,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-23 23:19:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-23 23:19:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-23 23:19:32,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:32,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-23 23:19:32,765 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2020-11-23 23:19:32,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:32,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770855895] [2020-11-23 23:19:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:33,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770855895] [2020-11-23 23:19:33,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-23 23:19:33,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-23 23:19:33,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250738237] [2020-11-23 23:19:33,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-23 23:19:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-23 23:19:33,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-23 23:19:33,035 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-23 23:19:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:33,079 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-23 23:19:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-23 23:19:33,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-23 23:19:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:33,092 INFO L225 Difference]: With dead ends: 17 [2020-11-23 23:19:33,093 INFO L226 Difference]: Without dead ends: 7 [2020-11-23 23:19:33,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-23 23:19:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-23 23:19:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-23 23:19:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-23 23:19:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-23 23:19:33,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-23 23:19:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:33,140 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-23 23:19:33,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-23 23:19:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-23 23:19:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-23 23:19:33,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:33,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-23 23:19:33,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-23 23:19:33,142 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2020-11-23 23:19:33,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:33,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534720441] [2020-11-23 23:19:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:33,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534720441] [2020-11-23 23:19:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228389529] [2020-11-23 23:19:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-23 23:19:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:33,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:33,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-23 23:19:33,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733028883] [2020-11-23 23:19:33,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-23 23:19:33,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-23 23:19:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-23 23:19:33,427 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2020-11-23 23:19:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:33,451 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-11-23 23:19:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 23:19:33,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-23 23:19:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:33,452 INFO L225 Difference]: With dead ends: 11 [2020-11-23 23:19:33,452 INFO L226 Difference]: Without dead ends: 8 [2020-11-23 23:19:33,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-23 23:19:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-23 23:19:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-23 23:19:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-23 23:19:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-23 23:19:33,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-23 23:19:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:33,459 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-23 23:19:33,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-23 23:19:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-23 23:19:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-23 23:19:33,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:33,460 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-23 23:19:33,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-23 23:19:33,673 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 2 times [2020-11-23 23:19:33,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:33,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101868162] [2020-11-23 23:19:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:33,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101868162] [2020-11-23 23:19:33,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062936260] [2020-11-23 23:19:33,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:33,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-23 23:19:33,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:33,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-23 23:19:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:33,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:33,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-23 23:19:33,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715791910] [2020-11-23 23:19:33,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-23 23:19:33,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:33,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-23 23:19:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-23 23:19:33,817 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2020-11-23 23:19:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:33,843 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-23 23:19:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-23 23:19:33,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-23 23:19:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:33,846 INFO L225 Difference]: With dead ends: 12 [2020-11-23 23:19:33,846 INFO L226 Difference]: Without dead ends: 9 [2020-11-23 23:19:33,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-23 23:19:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-23 23:19:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-23 23:19:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-23 23:19:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-23 23:19:33,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-11-23 23:19:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:33,851 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-23 23:19:33,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-23 23:19:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-23 23:19:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-23 23:19:33,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:33,853 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2020-11-23 23:19:34,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:34,064 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash 145055718, now seen corresponding path program 3 times [2020-11-23 23:19:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:34,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724689417] [2020-11-23 23:19:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:34,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724689417] [2020-11-23 23:19:34,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627883159] [2020-11-23 23:19:34,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:34,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-23 23:19:34,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:34,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-23 23:19:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:34,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:34,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-23 23:19:34,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591754952] [2020-11-23 23:19:34,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-23 23:19:34,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-23 23:19:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-23 23:19:34,264 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2020-11-23 23:19:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:34,281 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-11-23 23:19:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-23 23:19:34,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-11-23 23:19:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:34,282 INFO L225 Difference]: With dead ends: 13 [2020-11-23 23:19:34,283 INFO L226 Difference]: Without dead ends: 10 [2020-11-23 23:19:34,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-23 23:19:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-23 23:19:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-23 23:19:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-23 23:19:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-23 23:19:34,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-11-23 23:19:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:34,287 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-23 23:19:34,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-23 23:19:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-23 23:19:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-23 23:19:34,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:34,288 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-11-23 23:19:34,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:34,498 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 4 times [2020-11-23 23:19:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716245092] [2020-11-23 23:19:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716245092] [2020-11-23 23:19:34,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446839107] [2020-11-23 23:19:34,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:34,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-23 23:19:34,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-23 23:19:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:34,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:34,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-23 23:19:34,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513509703] [2020-11-23 23:19:34,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-23 23:19:34,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-23 23:19:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-23 23:19:34,646 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2020-11-23 23:19:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:34,661 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-11-23 23:19:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-23 23:19:34,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-11-23 23:19:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:34,663 INFO L225 Difference]: With dead ends: 14 [2020-11-23 23:19:34,663 INFO L226 Difference]: Without dead ends: 11 [2020-11-23 23:19:34,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-23 23:19:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-23 23:19:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-23 23:19:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-23 23:19:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-23 23:19:34,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-23 23:19:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:34,668 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-23 23:19:34,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-23 23:19:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-23 23:19:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-23 23:19:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:34,669 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2020-11-23 23:19:34,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:34,878 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1957592038, now seen corresponding path program 5 times [2020-11-23 23:19:34,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:34,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188233629] [2020-11-23 23:19:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188233629] [2020-11-23 23:19:35,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779228276] [2020-11-23 23:19:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:35,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-23 23:19:35,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-23 23:19:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-23 23:19:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232205429] [2020-11-23 23:19:35,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-23 23:19:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-23 23:19:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-23 23:19:35,087 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2020-11-23 23:19:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:35,107 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-23 23:19:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-23 23:19:35,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-11-23 23:19:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:35,109 INFO L225 Difference]: With dead ends: 15 [2020-11-23 23:19:35,109 INFO L226 Difference]: Without dead ends: 12 [2020-11-23 23:19:35,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-23 23:19:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-23 23:19:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-23 23:19:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-23 23:19:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-23 23:19:35,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-11-23 23:19:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:35,113 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-23 23:19:35,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-23 23:19:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-23 23:19:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-23 23:19:35,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:35,114 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2020-11-23 23:19:35,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-23 23:19:35,324 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:35,325 INFO L82 PathProgramCache]: Analyzing trace with hash 555748550, now seen corresponding path program 6 times [2020-11-23 23:19:35,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:35,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943392253] [2020-11-23 23:19:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943392253] [2020-11-23 23:19:35,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011686649] [2020-11-23 23:19:35,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:35,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-23 23:19:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-23 23:19:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:35,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-23 23:19:35,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291378558] [2020-11-23 23:19:35,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-23 23:19:35,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:35,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-23 23:19:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-23 23:19:35,478 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2020-11-23 23:19:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:35,497 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-23 23:19:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-23 23:19:35,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-11-23 23:19:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:35,498 INFO L225 Difference]: With dead ends: 16 [2020-11-23 23:19:35,499 INFO L226 Difference]: Without dead ends: 13 [2020-11-23 23:19:35,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-23 23:19:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-23 23:19:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-23 23:19:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-23 23:19:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-23 23:19:35,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-11-23 23:19:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-23 23:19:35,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-23 23:19:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-23 23:19:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-23 23:19:35,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:35,504 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2020-11-23 23:19:35,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:35,714 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:35,715 INFO L82 PathProgramCache]: Analyzing trace with hash 48273382, now seen corresponding path program 7 times [2020-11-23 23:19:35,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:35,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991856372] [2020-11-23 23:19:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991856372] [2020-11-23 23:19:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77299888] [2020-11-23 23:19:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-23 23:19:35,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:35,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:35,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-23 23:19:35,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367997292] [2020-11-23 23:19:35,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-23 23:19:35,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-23 23:19:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-23 23:19:35,897 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2020-11-23 23:19:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:35,919 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-23 23:19:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-23 23:19:35,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-11-23 23:19:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:35,920 INFO L225 Difference]: With dead ends: 17 [2020-11-23 23:19:35,920 INFO L226 Difference]: Without dead ends: 14 [2020-11-23 23:19:35,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-23 23:19:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-23 23:19:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-23 23:19:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-23 23:19:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-23 23:19:35,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-23 23:19:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:35,925 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-23 23:19:35,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-23 23:19:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-23 23:19:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-23 23:19:35,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:35,926 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1] [2020-11-23 23:19:36,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:36,136 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1496412358, now seen corresponding path program 8 times [2020-11-23 23:19:36,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:36,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224058058] [2020-11-23 23:19:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224058058] [2020-11-23 23:19:36,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685918207] [2020-11-23 23:19:36,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:36,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-23 23:19:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-23 23:19:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:36,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:36,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-23 23:19:36,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834581166] [2020-11-23 23:19:36,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-23 23:19:36,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-23 23:19:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-23 23:19:36,309 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2020-11-23 23:19:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:36,343 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-11-23 23:19:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-23 23:19:36,343 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-11-23 23:19:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:36,344 INFO L225 Difference]: With dead ends: 18 [2020-11-23 23:19:36,344 INFO L226 Difference]: Without dead ends: 15 [2020-11-23 23:19:36,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-23 23:19:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-23 23:19:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-23 23:19:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-23 23:19:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-23 23:19:36,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-23 23:19:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:36,349 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-23 23:19:36,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-23 23:19:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-23 23:19:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-23 23:19:36,350 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:36,350 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1] [2020-11-23 23:19:36,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-23 23:19:36,560 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -855919642, now seen corresponding path program 9 times [2020-11-23 23:19:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:36,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071097326] [2020-11-23 23:19:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071097326] [2020-11-23 23:19:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102398765] [2020-11-23 23:19:36,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:36,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-23 23:19:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:36,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-23 23:19:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:36,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:36,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-23 23:19:36,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847496677] [2020-11-23 23:19:36,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-23 23:19:36,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-23 23:19:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-23 23:19:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-23 23:19:36,746 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2020-11-23 23:19:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:36,764 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-11-23 23:19:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-23 23:19:36,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-11-23 23:19:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:36,765 INFO L225 Difference]: With dead ends: 19 [2020-11-23 23:19:36,765 INFO L226 Difference]: Without dead ends: 16 [2020-11-23 23:19:36,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-23 23:19:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-23 23:19:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-23 23:19:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-23 23:19:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-23 23:19:36,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-23 23:19:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:36,769 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-23 23:19:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-23 23:19:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-23 23:19:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-23 23:19:36,770 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:36,770 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2020-11-23 23:19:36,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:19:36,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash -763767610, now seen corresponding path program 10 times [2020-11-23 23:19:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-23 23:19:36,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917121625] [2020-11-23 23:19:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-23 23:19:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 23:19:36,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 23:19:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-23 23:19:37,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-23 23:19:37,026 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-23 23:19:37,026 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-23 23:19:37,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-23 23:19:37,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 11:19:37 BoogieIcfgContainer [2020-11-23 23:19:37,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-23 23:19:37,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-23 23:19:37,061 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-23 23:19:37,061 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-23 23:19:37,062 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:32" (3/4) ... [2020-11-23 23:19:37,065 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-23 23:19:37,065 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-23 23:19:37,067 INFO L168 Benchmark]: Toolchain (without parser) took 5148.62 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 23.2 MB in the beginning and 24.2 MB in the end (delta: -1.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 16.1 GB. [2020-11-23 23:19:37,068 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 23:19:37,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.09 ms. Allocated memory is still 46.1 MB. Free memory was 22.6 MB in the beginning and 24.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-11-23 23:19:37,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.33 ms. Allocated memory is still 46.1 MB. Free memory was 24.7 MB in the beginning and 23.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 23:19:37,070 INFO L168 Benchmark]: Boogie Preprocessor took 20.88 ms. Allocated memory is still 46.1 MB. Free memory was 23.4 MB in the beginning and 22.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 23:19:37,071 INFO L168 Benchmark]: RCFGBuilder took 289.78 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 34.2 MB in the end (delta: -11.8 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-11-23 23:19:37,072 INFO L168 Benchmark]: TraceAbstraction took 4426.54 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 24.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-11-23 23:19:37,072 INFO L168 Benchmark]: Witness Printer took 4.28 ms. Allocated memory is still 56.6 MB. Free memory was 24.6 MB in the beginning and 24.2 MB in the end (delta: 404.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 23:19:37,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 37.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.09 ms. Allocated memory is still 46.1 MB. Free memory was 22.6 MB in the beginning and 24.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.33 ms. Allocated memory is still 46.1 MB. Free memory was 24.7 MB in the beginning and 23.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.88 ms. Allocated memory is still 46.1 MB. Free memory was 23.4 MB in the beginning and 22.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 289.78 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.4 MB in the beginning and 34.2 MB in the end (delta: -11.8 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4426.54 ms. Allocated memory is still 56.6 MB. Free memory was 33.8 MB in the beginning and 24.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.28 ms. Allocated memory is still 56.6 MB. Free memory was 24.6 MB in the beginning and 24.2 MB in the end (delta: 404.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 16, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 24. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0] [L27] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0] [L4] __assert_fail("0", "drift_tenth.c.p+cfa-reducer.c", 4, "reach_error") VAL [__return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 0 SDslu, 141 SDs, 0 SdLazy, 114 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 200 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 3786 SizeOfPredicates, 9 NumberOfNonLiveVariables, 527 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 0/330 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 0.2.0-88b5e43 [2020-11-23 23:19:39,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-23 23:19:39,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-23 23:19:39,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-23 23:19:39,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-23 23:19:39,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-23 23:19:39,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-23 23:19:39,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-23 23:19:39,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-23 23:19:39,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-23 23:19:39,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-23 23:19:39,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-23 23:19:39,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-23 23:19:39,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-23 23:19:39,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-23 23:19:39,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-23 23:19:39,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-23 23:19:39,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-23 23:19:39,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-23 23:19:39,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-23 23:19:39,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-23 23:19:39,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-23 23:19:39,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-23 23:19:39,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-23 23:19:39,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-23 23:19:39,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-23 23:19:39,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-23 23:19:39,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-23 23:19:39,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-23 23:19:39,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-23 23:19:39,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-23 23:19:39,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-23 23:19:39,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-23 23:19:39,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-23 23:19:39,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-23 23:19:39,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-23 23:19:39,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-23 23:19:39,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-23 23:19:39,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-23 23:19:39,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-23 23:19:39,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-23 23:19:39,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-23 23:19:39,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-23 23:19:39,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-23 23:19:39,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-23 23:19:39,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-23 23:19:39,858 INFO L138 SettingsManager]: * Use SBE=true [2020-11-23 23:19:39,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-23 23:19:39,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-23 23:19:39,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-23 23:19:39,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-23 23:19:39,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-23 23:19:39,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-23 23:19:39,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-23 23:19:39,861 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-23 23:19:39,861 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-23 23:19:39,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-23 23:19:39,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-23 23:19:39,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-23 23:19:39,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-23 23:19:39,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-23 23:19:39,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-23 23:19:39,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-23 23:19:39,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-23 23:19:39,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-23 23:19:39,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-23 23:19:39,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-23 23:19:39,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-23 23:19:39,863 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-23 23:19:39,864 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-23 23:19:39,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-23 23:19:39,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-23 23:19:39,864 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-23 23:19:39,864 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a552001c735a44e7c5826cbc850fdca20f73d60 [2020-11-23 23:19:40,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-23 23:19:40,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-23 23:19:40,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-23 23:19:40,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-23 23:19:40,273 INFO L275 PluginConnector]: CDTParser initialized [2020-11-23 23:19:40,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:40,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15191ecaf/9d08883a5e5a485587e90b268cecd958/FLAGb6c929e5f [2020-11-23 23:19:40,949 INFO L306 CDTParser]: Found 1 translation units. [2020-11-23 23:19:40,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:40,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15191ecaf/9d08883a5e5a485587e90b268cecd958/FLAGb6c929e5f [2020-11-23 23:19:41,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15191ecaf/9d08883a5e5a485587e90b268cecd958 [2020-11-23 23:19:41,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-23 23:19:41,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-23 23:19:41,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-23 23:19:41,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-23 23:19:41,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-23 23:19:41,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a316ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41, skipping insertion in model container [2020-11-23 23:19:41,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,347 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-11-23 23:19:41,362 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-11-23 23:19:41,522 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-11-23 23:19:41,539 INFO L212 MainTranslator]: Completed pre-run [2020-11-23 23:19:41,557 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-11-23 23:19:41,576 INFO L217 MainTranslator]: Completed translation [2020-11-23 23:19:41,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41 WrapperNode [2020-11-23 23:19:41,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-23 23:19:41,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-23 23:19:41,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-23 23:19:41,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-23 23:19:41,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-23 23:19:41,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-23 23:19:41,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-23 23:19:41,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-23 23:19:41,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... [2020-11-23 23:19:41,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-23 23:19:41,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-23 23:19:41,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-23 23:19:41,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-23 23:19:41,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-11-23 23:19:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-11-23 23:19:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-23 23:19:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-23 23:19:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-23 23:19:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-23 23:19:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-11-23 23:19:42,062 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-23 23:19:42,063 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-23 23:19:42,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:42 BoogieIcfgContainer [2020-11-23 23:19:42,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-23 23:19:42,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-23 23:19:42,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-23 23:19:42,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-23 23:19:42,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:19:41" (1/3) ... [2020-11-23 23:19:42,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f59d3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:42, skipping insertion in model container [2020-11-23 23:19:42,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:19:41" (2/3) ... [2020-11-23 23:19:42,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f59d3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:19:42, skipping insertion in model container [2020-11-23 23:19:42,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:42" (3/3) ... [2020-11-23 23:19:42,077 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-11-23 23:19:42,093 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-23 23:19:42,099 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-23 23:19:42,115 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-23 23:19:42,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-23 23:19:42,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-23 23:19:42,179 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-23 23:19:42,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-23 23:19:42,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-23 23:19:42,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-23 23:19:42,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-23 23:19:42,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-23 23:19:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-23 23:19:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-23 23:19:42,215 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:42,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-23 23:19:42,217 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2020-11-23 23:19:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 23:19:42,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436193706] [2020-11-23 23:19:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-11-23 23:19:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:42,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-23 23:19:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:42,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-23 23:19:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:42,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436193706] [2020-11-23 23:19:42,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-23 23:19:42,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-23 23:19:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237072458] [2020-11-23 23:19:42,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-23 23:19:42,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-23 23:19:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-23 23:19:42,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-23 23:19:42,549 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-11-23 23:19:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:42,681 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-11-23 23:19:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-23 23:19:42,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-23 23:19:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:42,696 INFO L225 Difference]: With dead ends: 18 [2020-11-23 23:19:42,696 INFO L226 Difference]: Without dead ends: 8 [2020-11-23 23:19:42,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-23 23:19:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-23 23:19:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-23 23:19:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-23 23:19:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-23 23:19:42,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-11-23 23:19:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:42,735 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-23 23:19:42,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-23 23:19:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-23 23:19:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-23 23:19:42,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:42,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-23 23:19:42,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-23 23:19:42,952 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 1 times [2020-11-23 23:19:42,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 23:19:42,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189501271] [2020-11-23 23:19:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-11-23 23:19:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-23 23:19:43,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-23 23:19:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:43,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-23 23:19:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-23 23:19:43,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189501271] [2020-11-23 23:19:43,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-23 23:19:43,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-23 23:19:43,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740721887] [2020-11-23 23:19:43,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-23 23:19:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-23 23:19:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-23 23:19:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-23 23:19:43,281 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2020-11-23 23:19:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-23 23:19:43,696 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-11-23 23:19:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-23 23:19:43,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2020-11-23 23:19:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-23 23:19:43,700 INFO L225 Difference]: With dead ends: 15 [2020-11-23 23:19:43,701 INFO L226 Difference]: Without dead ends: 12 [2020-11-23 23:19:43,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-23 23:19:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-23 23:19:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-23 23:19:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-23 23:19:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-23 23:19:43,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2020-11-23 23:19:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-23 23:19:43,707 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-23 23:19:43,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-23 23:19:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-23 23:19:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-23 23:19:43,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-23 23:19:43,708 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2020-11-23 23:19:43,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-23 23:19:43,922 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-23 23:19:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-23 23:19:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash 555748550, now seen corresponding path program 2 times [2020-11-23 23:19:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-23 23:19:43,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787956587] [2020-11-23 23:19:43,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-11-23 23:19:44,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-23 23:19:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:19:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-23 23:19:44,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:19:44,931 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-23 23:19:48,611 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-11-23 23:20:01,124 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-23 23:20:17,644 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification that was a NOOP. DAG size: 58 [2020-11-23 23:20:42,693 WARN L193 SmtUtils]: Spent 6.72 s on a formula simplification that was a NOOP. DAG size: 65 [2020-11-23 23:21:23,721 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification that was a NOOP. DAG size: 72 [2020-11-23 23:22:03,460 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-11-23 23:22:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787956587] [2020-11-23 23:22:03,463 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-11-23 23:22:03,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124557549] [2020-11-23 23:22:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-23 23:22:04,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-23 23:22:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:22:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-23 23:22:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:22:04,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6ce7a79c [2020-11-23 23:22:04,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496911706] [2020-11-23 23:22:04,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:22:04,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-23 23:22:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-23 23:22:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-23 23:22:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-23 23:22:04,536 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@6ce7a79c [2020-11-23 23:22:04,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-23 23:22:04,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-23 23:22:04,537 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-11-23 23:22:04,537 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-23 23:22:05,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-23 23:22:05,161 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-23 23:22:05,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 11:22:05 BoogieIcfgContainer [2020-11-23 23:22:05,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-23 23:22:05,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-23 23:22:05,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-23 23:22:05,163 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-23 23:22:05,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:19:42" (3/4) ... [2020-11-23 23:22:05,167 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-23 23:22:05,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-23 23:22:05,169 INFO L168 Benchmark]: Toolchain (without parser) took 143846.54 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 41.1 MB in the beginning and 28.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,170 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 39.8 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 23:22:05,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.25 ms. Allocated memory is still 56.6 MB. Free memory was 40.5 MB in the beginning and 30.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,173 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.84 ms. Allocated memory is still 56.6 MB. Free memory was 30.4 MB in the beginning and 29.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,177 INFO L168 Benchmark]: Boogie Preprocessor took 26.59 ms. Allocated memory is still 56.6 MB. Free memory was 29.0 MB in the beginning and 27.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,179 INFO L168 Benchmark]: RCFGBuilder took 418.51 ms. Allocated memory is still 56.6 MB. Free memory was 27.8 MB in the beginning and 31.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,181 INFO L168 Benchmark]: TraceAbstraction took 143094.28 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 31.0 MB in the beginning and 28.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. [2020-11-23 23:22:05,184 INFO L168 Benchmark]: Witness Printer took 4.80 ms. Allocated memory is still 71.3 MB. Free memory was 28.9 MB in the beginning and 28.4 MB in the end (delta: 593.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-23 23:22:05,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 39.8 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.25 ms. Allocated memory is still 56.6 MB. Free memory was 40.5 MB in the beginning and 30.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.84 ms. Allocated memory is still 56.6 MB. Free memory was 30.4 MB in the beginning and 29.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.59 ms. Allocated memory is still 56.6 MB. Free memory was 29.0 MB in the beginning and 27.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 418.51 ms. Allocated memory is still 56.6 MB. Free memory was 27.8 MB in the beginning and 31.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 143094.28 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 31.0 MB in the beginning and 28.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.80 ms. Allocated memory is still 71.3 MB. Free memory was 28.9 MB in the beginning and 28.4 MB in the end (delta: 593.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1] int __return_main; [L9] EXPR 0.10000000149011612 [L9] float main__tick = 0.10000000149011612; [L10] EXPR 0.0 [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND TRUE main__i < 10 [L16] EXPR main__time + main__tick [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 [L27] COND TRUE __VERIFIER_assert__cond == 0 [L4] __assert_fail("0", "drift_tenth.c.p+cfa-reducer.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 142.9s, OverallIterations: 3, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 24 SDs, 0 SdLazy, 24 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 2 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/6 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...