./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ea4cee1f1883c16db4b84df51657eeb8f7eeec7 ................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ea4cee1f1883c16db4b84df51657eeb8f7eeec7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 16:14:39,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:14:39,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:14:39,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:14:39,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:14:39,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:14:39,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:14:39,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:14:39,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:14:39,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:14:39,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:14:39,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:14:39,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:14:39,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:14:39,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:14:39,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:14:39,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:14:39,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:14:39,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:14:39,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:14:39,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:14:39,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:14:39,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:14:39,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:14:39,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:14:39,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:14:39,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:14:39,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:14:39,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:14:39,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:14:39,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:14:39,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:14:39,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:14:39,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:14:39,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:14:39,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:14:39,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:14:39,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:14:39,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:14:39,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:14:39,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:14:39,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 16:14:39,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:14:39,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:14:39,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:14:39,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:14:39,723 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:14:39,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:14:39,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:14:39,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 16:14:39,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:14:39,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:14:39,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:14:39,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:14:39,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:14:39,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:14:39,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:14:39,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:14:39,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:14:39,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:14:39,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:14:39,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:14:39,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:14:39,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:14:39,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:14:39,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:14:39,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:14:39,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 16:14:39,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 16:14:39,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:14:39,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:14:39,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ea4cee1f1883c16db4b84df51657eeb8f7eeec7 [2020-12-02 16:14:40,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:14:40,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:14:40,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:14:40,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:14:40,147 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:14:40,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-12-02 16:14:40,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3181f2ff/a3990c3d22344d589a6cd9f626058e5a/FLAGab9ad2f31 [2020-12-02 16:14:40,836 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:14:40,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-12-02 16:14:40,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3181f2ff/a3990c3d22344d589a6cd9f626058e5a/FLAGab9ad2f31 [2020-12-02 16:14:41,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3181f2ff/a3990c3d22344d589a6cd9f626058e5a [2020-12-02 16:14:41,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:14:41,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:14:41,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:14:41,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:14:41,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:14:41,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d3126e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41, skipping insertion in model container [2020-12-02 16:14:41,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,186 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:14:41,207 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:14:41,471 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c[1741,1754] [2020-12-02 16:14:41,475 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:14:41,485 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:14:41,515 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c[1741,1754] [2020-12-02 16:14:41,516 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:14:41,534 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:14:41,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41 WrapperNode [2020-12-02 16:14:41,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:14:41,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:14:41,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:14:41,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:14:41,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:14:41,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:14:41,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:14:41,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:14:41,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... [2020-12-02 16:14:41,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:14:41,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:14:41,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:14:41,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:14:41,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:14:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 16:14:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:14:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-02 16:14:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 16:14:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 16:14:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:14:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:14:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 16:14:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:14:42,229 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:14:42,230 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-02 16:14:42,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:14:42 BoogieIcfgContainer [2020-12-02 16:14:42,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:14:42,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:14:42,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:14:42,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:14:42,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:14:41" (1/3) ... [2020-12-02 16:14:42,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3367dc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:14:42, skipping insertion in model container [2020-12-02 16:14:42,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:41" (2/3) ... [2020-12-02 16:14:42,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3367dc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:14:42, skipping insertion in model container [2020-12-02 16:14:42,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:14:42" (3/3) ... [2020-12-02 16:14:42,242 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-12-02 16:14:42,259 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:14:42,268 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:14:42,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:14:42,313 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:14:42,313 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:14:42,313 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:14:42,314 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:14:42,314 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:14:42,314 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:14:42,314 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:14:42,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:14:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-02 16:14:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 16:14:42,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:14:42,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:14:42,340 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:14:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:14:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2022248449, now seen corresponding path program 1 times [2020-12-02 16:14:42,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:14:42,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98119276] [2020-12-02 16:14:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:14:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:14:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:42,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98119276] [2020-12-02 16:14:42,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:14:42,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 16:14:42,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987101213] [2020-12-02 16:14:42,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:14:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 16:14:42,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:14:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:14:42,549 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-02 16:14:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:14:42,570 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-12-02 16:14:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:14:42,572 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 16:14:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:14:42,582 INFO L225 Difference]: With dead ends: 58 [2020-12-02 16:14:42,583 INFO L226 Difference]: Without dead ends: 27 [2020-12-02 16:14:42,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:14:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-02 16:14:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-02 16:14:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-02 16:14:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-02 16:14:42,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2020-12-02 16:14:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:14:42,627 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-02 16:14:42,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:14:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-02 16:14:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 16:14:42,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:14:42,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:14:42,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 16:14:42,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:14:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:14:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash -62588350, now seen corresponding path program 1 times [2020-12-02 16:14:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 16:14:42,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193906534] [2020-12-02 16:14:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 16:14:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:14:42,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:14:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 16:14:42,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 16:14:42,853 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 16:14:42,854 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 16:14:42,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 16:14:42,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:14:42 BoogieIcfgContainer [2020-12-02 16:14:42,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 16:14:42,904 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 16:14:42,904 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 16:14:42,905 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 16:14:42,905 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:14:42" (3/4) ... [2020-12-02 16:14:42,910 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 16:14:42,910 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 16:14:42,915 INFO L168 Benchmark]: Toolchain (without parser) took 1750.96 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 28.2 MB in the beginning and 38.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2020-12-02 16:14:42,917 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 35.7 MB. Free memory was 18.2 MB in the beginning and 18.2 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:14:42,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.32 ms. Allocated memory is still 50.3 MB. Free memory was 28.0 MB in the beginning and 30.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-02 16:14:42,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.13 ms. Allocated memory is still 50.3 MB. Free memory was 30.7 MB in the beginning and 29.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:14:42,921 INFO L168 Benchmark]: Boogie Preprocessor took 35.57 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:14:42,923 INFO L168 Benchmark]: RCFGBuilder took 569.26 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 21.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-12-02 16:14:42,926 INFO L168 Benchmark]: TraceAbstraction took 670.22 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 38.7 MB in the end (delta: -17.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:14:42,927 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 60.8 MB. Free memory is still 38.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:14:42,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 35.7 MB. Free memory was 18.2 MB in the beginning and 18.2 MB in the end (delta: 31.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 372.32 ms. Allocated memory is still 50.3 MB. Free memory was 28.0 MB in the beginning and 30.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.13 ms. Allocated memory is still 50.3 MB. Free memory was 30.7 MB in the beginning and 29.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.57 ms. Allocated memory is still 50.3 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 569.26 ms. Allocated memory is still 50.3 MB. Free memory was 27.5 MB in the beginning and 21.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 670.22 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 38.7 MB in the end (delta: -17.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.85 ms. Allocated memory is still 60.8 MB. Free memory is still 38.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someUnaryFLOAT_SMToperation at line 77, overapproximation of bitwiseAnd at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 81. Possible FailurePath: [L13] static const float huge_floor = 1.0e30; VAL [huge_floor=1000000000000000000000000000000] [L77] float x = -0.0f; [L16] __int32_t i0, j0; [L17] __uint32_t i, ix; VAL [huge_floor=1000000000000000000000000000000] [L19] ieee_float_shape_type gf_u; [L20] gf_u.value = (x) [L21] EXPR gf_u.word [L21] (i0) = gf_u.word [L23] ix = (i0 & 0x7fffffff) [L24] j0 = (ix >> 23) - 0x7f VAL [huge_floor=1000000000000000000000000000000] [L25] COND FALSE !(j0 < 23) VAL [huge_floor=1000000000000000000000000000000] [L45] COND FALSE !(!((ix) < 0x7f800000L)) [L48] return x; VAL [huge_floor=1000000000000000000000000000000] [L78] float res = floor_float(x); [L81] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [huge_floor=1000000000000000000000000000000] [L81] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L82] reach_error() VAL [huge_floor=1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 16:14:45,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 16:14:45,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 16:14:45,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 16:14:45,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 16:14:45,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 16:14:45,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 16:14:45,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 16:14:45,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 16:14:45,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 16:14:45,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 16:14:45,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 16:14:45,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 16:14:45,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 16:14:45,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 16:14:45,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 16:14:45,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 16:14:45,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 16:14:45,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 16:14:45,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 16:14:45,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 16:14:45,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 16:14:45,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 16:14:45,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 16:14:45,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 16:14:45,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 16:14:45,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 16:14:45,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 16:14:45,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 16:14:45,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 16:14:45,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 16:14:45,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 16:14:45,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 16:14:45,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 16:14:45,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 16:14:45,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 16:14:45,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 16:14:45,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 16:14:45,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 16:14:45,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 16:14:45,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 16:14:45,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 16:14:45,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 16:14:45,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 16:14:45,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 16:14:45,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 16:14:45,663 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 16:14:45,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 16:14:45,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 16:14:45,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 16:14:45,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 16:14:45,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 16:14:45,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 16:14:45,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 16:14:45,665 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 16:14:45,665 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 16:14:45,665 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 16:14:45,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 16:14:45,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 16:14:45,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 16:14:45,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 16:14:45,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 16:14:45,666 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 16:14:45,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 16:14:45,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:14:45,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 16:14:45,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 16:14:45,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 16:14:45,668 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 16:14:45,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 16:14:45,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 16:14:45,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 16:14:45,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 16:14:45,669 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ea4cee1f1883c16db4b84df51657eeb8f7eeec7 [2020-12-02 16:14:46,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 16:14:46,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 16:14:46,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 16:14:46,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 16:14:46,104 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 16:14:46,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-12-02 16:14:46,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8629e0b86/d7391b01d3ed46548e49a1f3150fcf17/FLAGdd631f6df [2020-12-02 16:14:46,783 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 16:14:46,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-12-02 16:14:46,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8629e0b86/d7391b01d3ed46548e49a1f3150fcf17/FLAGdd631f6df [2020-12-02 16:14:47,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8629e0b86/d7391b01d3ed46548e49a1f3150fcf17 [2020-12-02 16:14:47,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 16:14:47,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 16:14:47,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 16:14:47,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 16:14:47,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 16:14:47,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1369312b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47, skipping insertion in model container [2020-12-02 16:14:47,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,202 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 16:14:47,225 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 16:14:47,491 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c[1741,1754] [2020-12-02 16:14:47,495 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:14:47,510 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 16:14:47,551 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c[1741,1754] [2020-12-02 16:14:47,557 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 16:14:47,588 INFO L217 MainTranslator]: Completed translation [2020-12-02 16:14:47,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47 WrapperNode [2020-12-02 16:14:47,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 16:14:47,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 16:14:47,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 16:14:47,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 16:14:47,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 16:14:47,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 16:14:47,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 16:14:47,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 16:14:47,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... [2020-12-02 16:14:47,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 16:14:47,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 16:14:47,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 16:14:47,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 16:14:47,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 16:14:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 16:14:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 16:14:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 16:14:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2020-12-02 16:14:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 16:14:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 16:14:47,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 16:14:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-12-02 16:14:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 16:14:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-02 16:14:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 16:14:48,520 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 16:14:48,520 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-02 16:14:48,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:14:48 BoogieIcfgContainer [2020-12-02 16:14:48,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 16:14:48,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 16:14:48,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 16:14:48,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 16:14:48,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:14:47" (1/3) ... [2020-12-02 16:14:48,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62381a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:14:48, skipping insertion in model container [2020-12-02 16:14:48,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:14:47" (2/3) ... [2020-12-02 16:14:48,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62381a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:14:48, skipping insertion in model container [2020-12-02 16:14:48,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:14:48" (3/3) ... [2020-12-02 16:14:48,537 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-12-02 16:14:48,555 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 16:14:48,560 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 16:14:48,572 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 16:14:48,617 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 16:14:48,617 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 16:14:48,617 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 16:14:48,617 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 16:14:48,617 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 16:14:48,617 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 16:14:48,617 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 16:14:48,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 16:14:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-02 16:14:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 16:14:48,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:14:48,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:14:48,641 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:14:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:14:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2022248449, now seen corresponding path program 1 times [2020-12-02 16:14:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:14:48,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220466224] [2020-12-02 16:14:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-02 16:14:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:14:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 16:14:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:14:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:48,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:14:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:48,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220466224] [2020-12-02 16:14:48,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:14:48,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 16:14:48,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509356230] [2020-12-02 16:14:48,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 16:14:48,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:14:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 16:14:48,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:14:48,877 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-02 16:14:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:14:48,896 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-12-02 16:14:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 16:14:48,898 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 16:14:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:14:48,908 INFO L225 Difference]: With dead ends: 58 [2020-12-02 16:14:48,909 INFO L226 Difference]: Without dead ends: 27 [2020-12-02 16:14:48,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 16:14:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-02 16:14:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-02 16:14:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-02 16:14:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-02 16:14:48,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2020-12-02 16:14:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:14:48,950 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-02 16:14:48,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 16:14:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-02 16:14:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 16:14:48,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:14:48,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:14:49,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 16:14:49,167 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:14:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:14:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash -62588350, now seen corresponding path program 1 times [2020-12-02 16:14:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:14:49,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62939181] [2020-12-02 16:14:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-02 16:14:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:14:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 16:14:49,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:14:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:49,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:14:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:49,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62939181] [2020-12-02 16:14:49,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:14:49,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-12-02 16:14:49,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310207289] [2020-12-02 16:14:49,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 16:14:49,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:14:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 16:14:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-02 16:14:49,601 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2020-12-02 16:14:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:14:50,053 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-12-02 16:14:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 16:14:50,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-02 16:14:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:14:50,056 INFO L225 Difference]: With dead ends: 51 [2020-12-02 16:14:50,057 INFO L226 Difference]: Without dead ends: 34 [2020-12-02 16:14:50,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-02 16:14:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-02 16:14:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2020-12-02 16:14:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-02 16:14:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-02 16:14:50,066 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2020-12-02 16:14:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:14:50,067 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-02 16:14:50,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 16:14:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-02 16:14:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 16:14:50,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:14:50,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:14:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 16:14:50,283 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:14:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:14:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1612307429, now seen corresponding path program 1 times [2020-12-02 16:14:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:14:50,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139514588] [2020-12-02 16:14:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-02 16:14:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:14:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-02 16:14:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:14:50,790 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-02 16:14:55,888 WARN L197 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-02 16:14:59,740 WARN L197 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 56 [2020-12-02 16:14:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:14:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:15:04,425 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-02 16:15:08,512 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-02 16:15:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:08,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139514588] [2020-12-02 16:15:08,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:15:08,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-02 16:15:08,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377220934] [2020-12-02 16:15:08,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 16:15:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:15:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 16:15:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2020-12-02 16:15:08,518 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2020-12-02 16:15:19,541 WARN L197 SmtUtils]: Spent 9.17 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-02 16:15:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:15:36,394 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-02 16:15:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 16:15:36,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-02 16:15:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:15:36,406 INFO L225 Difference]: With dead ends: 34 [2020-12-02 16:15:36,406 INFO L226 Difference]: Without dead ends: 22 [2020-12-02 16:15:36,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=26, Invalid=45, Unknown=1, NotChecked=0, Total=72 [2020-12-02 16:15:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-02 16:15:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-02 16:15:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-02 16:15:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-02 16:15:36,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-12-02 16:15:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:15:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-02 16:15:36,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 16:15:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-02 16:15:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 16:15:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:15:36,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:15:36,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-02 16:15:36,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:15:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:15:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1572128049, now seen corresponding path program 1 times [2020-12-02 16:15:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:15:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843169107] [2020-12-02 16:15:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-02 16:15:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:15:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-02 16:15:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:15:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:37,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:15:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:37,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843169107] [2020-12-02 16:15:37,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:15:37,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-12-02 16:15:37,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695082177] [2020-12-02 16:15:37,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 16:15:37,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:15:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 16:15:37,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-02 16:15:37,815 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-12-02 16:15:38,341 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-02 16:15:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:15:38,515 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-02 16:15:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 16:15:38,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-02 16:15:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:15:38,517 INFO L225 Difference]: With dead ends: 34 [2020-12-02 16:15:38,517 INFO L226 Difference]: Without dead ends: 22 [2020-12-02 16:15:38,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-02 16:15:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-02 16:15:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-02 16:15:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-02 16:15:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-02 16:15:38,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2020-12-02 16:15:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:15:38,524 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-02 16:15:38,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 16:15:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-02 16:15:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-02 16:15:38,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:15:38,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:15:38,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-02 16:15:38,740 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:15:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:15:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1913492621, now seen corresponding path program 1 times [2020-12-02 16:15:38,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:15:38,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612070135] [2020-12-02 16:15:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-02 16:15:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:15:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-02 16:15:38,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:15:39,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:15:39,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:15:39,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-02 16:15:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:15:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612070135] [2020-12-02 16:15:40,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:15:40,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-02 16:15:40,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99900716] [2020-12-02 16:15:40,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 16:15:40,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:15:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 16:15:40,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-02 16:15:40,231 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-12-02 16:15:40,996 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-02 16:15:41,175 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-02 16:15:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:15:41,233 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-12-02 16:15:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 16:15:41,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-02 16:15:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:15:41,235 INFO L225 Difference]: With dead ends: 25 [2020-12-02 16:15:41,235 INFO L226 Difference]: Without dead ends: 22 [2020-12-02 16:15:41,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-02 16:15:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-02 16:15:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-02 16:15:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-02 16:15:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-12-02 16:15:41,241 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 17 [2020-12-02 16:15:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:15:41,243 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-12-02 16:15:41,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 16:15:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-12-02 16:15:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-02 16:15:41,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 16:15:41,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 16:15:41,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-02 16:15:41,452 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 16:15:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 16:15:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash 805440418, now seen corresponding path program 1 times [2020-12-02 16:15:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 16:15:41,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831777424] [2020-12-02 16:15:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-02 16:15:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 16:15:41,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-02 16:15:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 16:15:42,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 16:15:42,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-02 16:15:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 16:15:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 16:15:45,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831777424] [2020-12-02 16:15:45,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 16:15:45,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-12-02 16:15:45,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542462668] [2020-12-02 16:15:45,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-02 16:15:45,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 16:15:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-02 16:15:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-12-02 16:15:45,551 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 16 states. [2020-12-02 16:15:53,742 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-02 16:15:54,107 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-02 16:15:54,496 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-02 16:15:54,843 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-02 16:15:55,188 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-02 16:15:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 16:15:55,220 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-12-02 16:15:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-02 16:15:55,222 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-12-02 16:15:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 16:15:55,222 INFO L225 Difference]: With dead ends: 22 [2020-12-02 16:15:55,222 INFO L226 Difference]: Without dead ends: 0 [2020-12-02 16:15:55,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-12-02 16:15:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-02 16:15:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-02 16:15:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-02 16:15:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-02 16:15:55,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-12-02 16:15:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 16:15:55,223 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-02 16:15:55,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-02 16:15:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-02 16:15:55,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-02 16:15:55,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-02 16:15:55,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-02 16:16:01,172 WARN L197 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2020-12-02 16:22:03,290 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-02 16:22:03,291 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:222) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:131) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.push(UndoableWrapperScript.java:53) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:1052) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 36 more [2020-12-02 16:22:03,298 INFO L168 Benchmark]: Toolchain (without parser) took 436116.77 ms. Allocated memory was 41.9 MB in the beginning and 62.9 MB in the end (delta: 21.0 MB). Free memory was 19.3 MB in the beginning and 27.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:03,300 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory is still 23.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:03,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.33 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 18.7 MB in the end (delta: 420.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:03,302 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.82 ms. Allocated memory is still 41.9 MB. Free memory was 18.7 MB in the beginning and 16.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:03,302 INFO L168 Benchmark]: Boogie Preprocessor took 43.47 ms. Allocated memory is still 41.9 MB. Free memory was 16.7 MB in the beginning and 15.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 16:22:03,303 INFO L168 Benchmark]: RCFGBuilder took 839.48 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 15.1 MB in the beginning and 29.1 MB in the end (delta: -14.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:03,304 INFO L168 Benchmark]: TraceAbstraction took 434767.40 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 27.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-12-02 16:22:03,309 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 41.9 MB. Free memory is still 23.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 406.33 ms. Allocated memory is still 41.9 MB. Free memory was 19.1 MB in the beginning and 18.7 MB in the end (delta: 420.2 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.82 ms. Allocated memory is still 41.9 MB. Free memory was 18.7 MB in the beginning and 16.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.47 ms. Allocated memory is still 41.9 MB. Free memory was 16.7 MB in the beginning and 15.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 839.48 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 15.1 MB in the beginning and 29.1 MB in the end (delta: -14.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 434767.40 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.9 MB in the beginning and 27.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...