./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.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/double_req_bl_1251b.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 0dca3295f12b1ef36cf31c463cf879069525072f .......................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/double_req_bl_1251b.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 0dca3295f12b1ef36cf31c463cf879069525072f ............................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 20:01:58,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 20:01:58,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 20:01:58,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 20:01:58,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 20:01:58,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 20:01:58,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 20:01:58,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 20:01:58,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 20:01:58,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 20:01:58,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 20:01:58,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 20:01:58,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 20:01:58,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 20:01:58,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 20:01:58,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 20:01:58,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 20:01:58,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 20:01:58,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 20:01:58,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 20:01:58,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 20:01:58,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 20:01:58,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 20:01:58,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 20:01:58,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 20:01:58,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 20:01:58,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 20:01:58,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 20:01:58,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 20:01:58,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 20:01:58,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 20:01:58,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 20:01:58,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 20:01:58,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 20:01:58,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 20:01:58,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 20:01:58,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 20:01:58,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 20:01:58,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 20:01:58,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 20:01:58,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 20:01:58,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 20:01:58,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 20:01:58,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 20:01:58,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 20:01:58,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 20:01:58,641 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 20:01:58,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 20:01:58,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 20:01:58,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 20:01:58,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 20:01:58,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 20:01:58,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 20:01:58,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 20:01:58,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 20:01:58,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 20:01:58,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 20:01:58,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 20:01:58,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 20:01:58,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 20:01:58,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 20:01:58,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 20:01:58,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 20:01:58,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 20:01:58,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 20:01:58,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 20:01:58,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 20:01:58,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 20:01:58,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 20:01:58,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 20:01:58,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 20:01:58,646 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-12-02 20:01:59,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 20:01:59,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 20:01:59,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 20:01:59,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 20:01:59,121 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 20:01:59,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-12-02 20:01:59,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bfb42d88/c4043190466540a9981e1c63db436d38/FLAG21882ff05 [2020-12-02 20:01:59,930 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 20:01:59,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-12-02 20:01:59,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bfb42d88/c4043190466540a9981e1c63db436d38/FLAG21882ff05 [2020-12-02 20:02:00,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bfb42d88/c4043190466540a9981e1c63db436d38 [2020-12-02 20:02:00,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 20:02:00,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 20:02:00,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 20:02:00,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 20:02:00,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 20:02:00,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dff7d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00, skipping insertion in model container [2020-12-02 20:02:00,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,332 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 20:02:00,355 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 20:02:00,618 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/double_req_bl_1251b.c[2080,2093] [2020-12-02 20:02:00,621 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 20:02:00,632 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 20:02:00,662 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/double_req_bl_1251b.c[2080,2093] [2020-12-02 20:02:00,663 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 20:02:00,682 INFO L217 MainTranslator]: Completed translation [2020-12-02 20:02:00,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00 WrapperNode [2020-12-02 20:02:00,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 20:02:00,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 20:02:00,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 20:02:00,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 20:02:00,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 20:02:00,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 20:02:00,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 20:02:00,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 20:02:00,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (1/1) ... [2020-12-02 20:02:00,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 20:02:00,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 20:02:00,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 20:02:00,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 20:02:00,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (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 20:02:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 20:02:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 20:02:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 20:02:00,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 20:02:00,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 20:02:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 20:02:00,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 20:02:01,268 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 20:02:01,269 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-02 20:02:01,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:01 BoogieIcfgContainer [2020-12-02 20:02:01,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 20:02:01,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 20:02:01,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 20:02:01,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 20:02:01,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:02:00" (1/3) ... [2020-12-02 20:02:01,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f0f7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:01, skipping insertion in model container [2020-12-02 20:02:01,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:00" (2/3) ... [2020-12-02 20:02:01,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f0f7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:01, skipping insertion in model container [2020-12-02 20:02:01,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:01" (3/3) ... [2020-12-02 20:02:01,283 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-12-02 20:02:01,307 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 20:02:01,312 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 20:02:01,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 20:02:01,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 20:02:01,364 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 20:02:01,365 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 20:02:01,365 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 20:02:01,365 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 20:02:01,365 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 20:02:01,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 20:02:01,366 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 20:02:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-02 20:02:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 20:02:01,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:01,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:01,394 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-12-02 20:02:01,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:01,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694374635] [2020-12-02 20:02:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:01,616 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 20:02:01,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694374635] [2020-12-02 20:02:01,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:01,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 20:02:01,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998230094] [2020-12-02 20:02:01,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 20:02:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 20:02:01,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 20:02:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 20:02:01,648 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-02 20:02:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:01,680 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2020-12-02 20:02:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 20:02:01,682 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-02 20:02:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:01,698 INFO L225 Difference]: With dead ends: 56 [2020-12-02 20:02:01,698 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 20:02:01,704 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 20:02:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 20:02:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 20:02:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 20:02:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-02 20:02:01,758 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-12-02 20:02:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:01,759 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-02 20:02:01,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 20:02:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-02 20:02:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 20:02:01,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:01,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:01,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 20:02:01,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-12-02 20:02:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:01,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278707949] [2020-12-02 20:02:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:01,958 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 20:02:01,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278707949] [2020-12-02 20:02:01,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:01,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 20:02:01,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787929924] [2020-12-02 20:02:01,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 20:02:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 20:02:01,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 20:02:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 20:02:01,968 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 4 states. [2020-12-02 20:02:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:02,028 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-12-02 20:02:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 20:02:02,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-02 20:02:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:02,030 INFO L225 Difference]: With dead ends: 40 [2020-12-02 20:02:02,031 INFO L226 Difference]: Without dead ends: 36 [2020-12-02 20:02:02,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 20:02:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-02 20:02:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-12-02 20:02:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 20:02:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-02 20:02:02,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-12-02 20:02:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:02,040 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-02 20:02:02,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 20:02:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-02 20:02:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 20:02:02,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:02,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:02,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 20:02:02,042 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1913129681, now seen corresponding path program 1 times [2020-12-02 20:02:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:02,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325844375] [2020-12-02 20:02:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:02,124 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 20:02:02,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325844375] [2020-12-02 20:02:02,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:02,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 20:02:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715904774] [2020-12-02 20:02:02,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 20:02:02,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 20:02:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 20:02:02,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 20:02:02,127 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-02 20:02:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:02,184 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-12-02 20:02:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 20:02:02,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-02 20:02:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:02,186 INFO L225 Difference]: With dead ends: 42 [2020-12-02 20:02:02,186 INFO L226 Difference]: Without dead ends: 38 [2020-12-02 20:02:02,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 20:02:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-02 20:02:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-02 20:02:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 20:02:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-02 20:02:02,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 13 [2020-12-02 20:02:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:02,193 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-02 20:02:02,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 20:02:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-02 20:02:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 20:02:02,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:02,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:02,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 20:02:02,195 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1959363189, now seen corresponding path program 1 times [2020-12-02 20:02:02,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:02,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797732566] [2020-12-02 20:02:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:02,273 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 20:02:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797732566] [2020-12-02 20:02:02,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:02,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 20:02:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377883149] [2020-12-02 20:02:02,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 20:02:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 20:02:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 20:02:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 20:02:02,277 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-02 20:02:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:02,376 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-12-02 20:02:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 20:02:02,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-02 20:02:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:02,381 INFO L225 Difference]: With dead ends: 44 [2020-12-02 20:02:02,381 INFO L226 Difference]: Without dead ends: 40 [2020-12-02 20:02:02,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 20:02:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-02 20:02:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2020-12-02 20:02:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 20:02:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-02 20:02:02,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 14 [2020-12-02 20:02:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:02,397 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-02 20:02:02,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 20:02:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-02 20:02:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 20:02:02,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:02,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:02,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 20:02:02,402 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1045511114, now seen corresponding path program 1 times [2020-12-02 20:02:02,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:02,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035749717] [2020-12-02 20:02:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:02,514 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 20:02:02,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035749717] [2020-12-02 20:02:02,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:02,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 20:02:02,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217953780] [2020-12-02 20:02:02,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 20:02:02,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 20:02:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 20:02:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 20:02:02,518 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 4 states. [2020-12-02 20:02:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:02,583 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-12-02 20:02:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 20:02:02,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-02 20:02:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:02,585 INFO L225 Difference]: With dead ends: 42 [2020-12-02 20:02:02,585 INFO L226 Difference]: Without dead ends: 38 [2020-12-02 20:02:02,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 20:02:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-02 20:02:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-02 20:02:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 20:02:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-02 20:02:02,592 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 15 [2020-12-02 20:02:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:02,593 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-02 20:02:02,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 20:02:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-02 20:02:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 20:02:02,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:02,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:02,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 20:02:02,594 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-12-02 20:02:02,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 20:02:02,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790241594] [2020-12-02 20:02:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 20:02:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 20:02:02,635 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 20:02:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 20:02:02,660 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 20:02:02,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 20:02:02,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 20:02:02,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 20:02:02,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:02:02 BoogieIcfgContainer [2020-12-02 20:02:02,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 20:02:02,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 20:02:02,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 20:02:02,729 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 20:02:02,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:01" (3/4) ... [2020-12-02 20:02:02,733 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 20:02:02,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 20:02:02,737 INFO L168 Benchmark]: Toolchain (without parser) took 2440.99 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 17.8 MB in the beginning and 19.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,738 INFO L168 Benchmark]: CDTParser took 1.05 ms. Allocated memory is still 39.8 MB. Free memory is still 24.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 20:02:02,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.06 ms. Allocated memory is still 39.8 MB. Free memory was 17.6 MB in the beginning and 16.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,740 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.35 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 16.4 MB in the beginning and 34.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,741 INFO L168 Benchmark]: Boogie Preprocessor took 36.52 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 33.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,742 INFO L168 Benchmark]: RCFGBuilder took 492.28 ms. Allocated memory is still 50.3 MB. Free memory was 33.6 MB in the beginning and 27.3 MB in the end (delta: 6.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,743 INFO L168 Benchmark]: TraceAbstraction took 1453.15 ms. Allocated memory is still 50.3 MB. Free memory was 26.9 MB in the beginning and 19.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:02,744 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 50.3 MB. Free memory was 19.4 MB in the beginning and 19.0 MB in the end (delta: 317.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 20:02:02,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05 ms. Allocated memory is still 39.8 MB. Free memory is still 24.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 383.06 ms. Allocated memory is still 39.8 MB. Free memory was 17.6 MB in the beginning and 16.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.35 ms. Allocated memory was 39.8 MB in the beginning and 50.3 MB in the end (delta: 10.5 MB). Free memory was 16.4 MB in the beginning and 34.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.52 ms. Allocated memory is still 50.3 MB. Free memory was 34.9 MB in the beginning and 33.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 492.28 ms. Allocated memory is still 50.3 MB. Free memory was 33.6 MB in the beginning and 27.3 MB in the end (delta: 6.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1453.15 ms. Allocated memory is still 50.3 MB. Free memory was 26.9 MB in the beginning and 19.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.85 ms. Allocated memory is still 50.3 MB. Free memory was 19.4 MB in the beginning and 19.0 MB in the end (delta: 317.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticDOUBLE_SMToperation at line 67, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 79. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L80] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 40 SDslu, 242 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 20:02:05,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 20:02:05,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 20:02:05,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 20:02:05,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 20:02:05,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 20:02:05,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 20:02:05,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 20:02:05,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 20:02:05,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 20:02:05,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 20:02:05,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 20:02:05,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 20:02:05,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 20:02:05,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 20:02:05,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 20:02:05,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 20:02:05,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 20:02:05,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 20:02:05,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 20:02:05,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 20:02:05,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 20:02:05,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 20:02:05,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 20:02:05,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 20:02:05,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 20:02:05,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 20:02:05,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 20:02:05,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 20:02:05,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 20:02:05,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 20:02:05,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 20:02:05,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 20:02:05,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 20:02:05,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 20:02:05,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 20:02:05,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 20:02:05,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 20:02:05,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 20:02:05,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 20:02:05,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 20:02:05,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 20:02:05,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 20:02:05,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 20:02:05,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 20:02:05,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 20:02:05,507 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 20:02:05,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 20:02:05,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 20:02:05,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 20:02:05,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 20:02:05,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 20:02:05,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 20:02:05,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 20:02:05,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 20:02:05,511 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 20:02:05,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 20:02:05,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 20:02:05,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 20:02:05,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 20:02:05,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 20:02:05,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 20:02:05,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 20:02:05,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 20:02:05,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 20:02:05,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 20:02:05,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 20:02:05,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 20:02:05,515 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 20:02:05,515 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 20:02:05,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 20:02:05,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 20:02:05,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 20:02:05,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dca3295f12b1ef36cf31c463cf879069525072f [2020-12-02 20:02:06,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 20:02:06,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 20:02:06,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 20:02:06,065 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 20:02:06,066 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 20:02:06,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-12-02 20:02:06,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960aec8cc/56193399378245068c0f2f0d0c838ffc/FLAG38eb69c5d [2020-12-02 20:02:06,844 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 20:02:06,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1251b.c [2020-12-02 20:02:06,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960aec8cc/56193399378245068c0f2f0d0c838ffc/FLAG38eb69c5d [2020-12-02 20:02:07,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960aec8cc/56193399378245068c0f2f0d0c838ffc [2020-12-02 20:02:07,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 20:02:07,176 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 20:02:07,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 20:02:07,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 20:02:07,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 20:02:07,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2630b8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07, skipping insertion in model container [2020-12-02 20:02:07,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,198 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 20:02:07,218 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 20:02:07,470 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/double_req_bl_1251b.c[2080,2093] [2020-12-02 20:02:07,474 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 20:02:07,493 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 20:02:07,525 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/double_req_bl_1251b.c[2080,2093] [2020-12-02 20:02:07,526 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 20:02:07,557 INFO L217 MainTranslator]: Completed translation [2020-12-02 20:02:07,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07 WrapperNode [2020-12-02 20:02:07,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 20:02:07,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 20:02:07,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 20:02:07,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 20:02:07,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 20:02:07,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 20:02:07,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 20:02:07,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 20:02:07,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (1/1) ... [2020-12-02 20:02:07,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 20:02:07,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 20:02:07,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 20:02:07,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 20:02:07,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (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 20:02:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 20:02:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-02 20:02:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 20:02:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 20:02:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 20:02:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 20:02:07,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 20:02:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 20:02:08,542 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 20:02:08,543 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-02 20:02:08,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:08 BoogieIcfgContainer [2020-12-02 20:02:08,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 20:02:08,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 20:02:08,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 20:02:08,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 20:02:08,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:02:07" (1/3) ... [2020-12-02 20:02:08,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a896da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:08, skipping insertion in model container [2020-12-02 20:02:08,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:07" (2/3) ... [2020-12-02 20:02:08,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a896da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:08, skipping insertion in model container [2020-12-02 20:02:08,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:08" (3/3) ... [2020-12-02 20:02:08,558 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2020-12-02 20:02:08,578 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 20:02:08,584 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 20:02:08,600 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 20:02:08,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 20:02:08,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 20:02:08,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 20:02:08,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 20:02:08,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 20:02:08,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 20:02:08,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 20:02:08,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 20:02:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-02 20:02:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 20:02:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:08,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:08,677 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash -124750094, now seen corresponding path program 1 times [2020-12-02 20:02:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 20:02:08,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095782377] [2020-12-02 20:02:08,699 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 20:02:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 20:02:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 20:02:09,622 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 20:02:09,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 20:02:09,636 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 20:02:09,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095782377] [2020-12-02 20:02:09,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:09,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 20:02:09,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971019290] [2020-12-02 20:02:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 20:02:09,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 20:02:09,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 20:02:09,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 20:02:09,663 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-02 20:02:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:09,685 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2020-12-02 20:02:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 20:02:09,686 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-02 20:02:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:09,697 INFO L225 Difference]: With dead ends: 56 [2020-12-02 20:02:09,698 INFO L226 Difference]: Without dead ends: 26 [2020-12-02 20:02:09,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 20:02:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-02 20:02:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-02 20:02:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-02 20:02:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-02 20:02:09,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2020-12-02 20:02:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:09,744 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-02 20:02:09,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 20:02:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-02 20:02:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 20:02:09,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:09,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:09,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 20:02:09,961 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:09,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1352831344, now seen corresponding path program 1 times [2020-12-02 20:02:09,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 20:02:09,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155994517] [2020-12-02 20:02:09,965 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 20:02:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 20:02:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 20:02:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 20:02:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 20:02:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 20:02:11,024 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 20:02:11,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155994517] [2020-12-02 20:02:11,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 20:02:11,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 20:02:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935008819] [2020-12-02 20:02:11,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 20:02:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 20:02:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 20:02:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 20:02:11,029 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-12-02 20:02:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 20:02:11,137 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-12-02 20:02:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 20:02:11,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-02 20:02:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 20:02:11,142 INFO L225 Difference]: With dead ends: 50 [2020-12-02 20:02:11,144 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 20:02:11,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-02 20:02:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 20:02:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-12-02 20:02:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 20:02:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-02 20:02:11,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 12 [2020-12-02 20:02:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 20:02:11,164 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-02 20:02:11,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 20:02:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-02 20:02:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 20:02:11,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 20:02:11,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 20:02:11,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 20:02:11,381 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 20:02:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 20:02:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1102769416, now seen corresponding path program 1 times [2020-12-02 20:02:11,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 20:02:11,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566268525] [2020-12-02 20:02:11,385 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 20:02:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 20:02:12,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 20:02:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 20:02:13,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 20:02:13,598 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 20:02:13,598 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 20:02:13,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-02 20:02:13,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 08:02:13 BoogieIcfgContainer [2020-12-02 20:02:13,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 20:02:13,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 20:02:13,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 20:02:13,845 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 20:02:13,845 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:08" (3/4) ... [2020-12-02 20:02:13,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 20:02:13,910 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 20:02:13,910 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 20:02:13,913 INFO L168 Benchmark]: Toolchain (without parser) took 6735.41 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 27.3 MB in the beginning and 43.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,914 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 41.9 MB. Free memory was 21.6 MB in the beginning and 21.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 20:02:13,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.72 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 27.1 MB in the end (delta: -56.3 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,916 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,916 INFO L168 Benchmark]: Boogie Preprocessor took 40.84 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 20:02:13,917 INFO L168 Benchmark]: RCFGBuilder took 889.23 ms. Allocated memory is still 50.3 MB. Free memory was 23.5 MB in the beginning and 28.1 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,918 INFO L168 Benchmark]: TraceAbstraction took 5295.81 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 27.5 MB in the beginning and 26.9 MB in the end (delta: 613.5 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,919 INFO L168 Benchmark]: Witness Printer took 66.39 ms. Allocated memory is still 62.9 MB. Free memory was 26.9 MB in the beginning and 43.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 20:02:13,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 41.9 MB. Free memory was 21.6 MB in the beginning and 21.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.72 ms. Allocated memory is still 50.3 MB. Free memory was 27.1 MB in the beginning and 27.1 MB in the end (delta: -56.3 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.05 ms. Allocated memory is still 50.3 MB. Free memory was 27.0 MB in the beginning and 25.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.84 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 23.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 889.23 ms. Allocated memory is still 50.3 MB. Free memory was 23.5 MB in the beginning and 28.1 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5295.81 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 27.5 MB in the beginning and 26.9 MB in the end (delta: 613.5 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 66.39 ms. Allocated memory is still 62.9 MB. Free memory was 26.9 MB in the beginning and 43.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 80]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] EXPR 0.0 [L67] EXPR 0.0 [L67] EXPR 0.0 / 0.0 [L67] double y = 0.0 / 0.0; [L18] return x != x; [L74] COND TRUE !isnan_double(x) [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x [L80] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 30 SDslu, 64 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 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, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 552 SizeOfPredicates, 1 NumberOfNonLiveVariables, 100 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 proved your program to be incorrect! Received shutdown request...