./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e1a00cf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.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 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-0e1a00c [2020-11-29 15:55:23,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:23,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:24,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:24,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:24,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:24,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:24,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:24,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:24,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:24,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:24,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:24,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:24,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:24,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:24,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:24,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:24,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:24,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:24,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:24,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:24,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:24,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:24,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:24,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:24,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:24,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:24,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:24,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:24,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:24,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:24,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:24,070 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:24,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:24,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:24,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:24,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:24,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:24,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:24,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:24,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:24,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 15:55:24,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:24,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:24,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:24,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:24,137 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:24,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:24,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:24,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 15:55:24,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:24,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:24,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:24,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:24,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:24,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:24,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:24,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:24,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:24,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:24,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:24,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:24,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:24,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:24,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:24,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:24,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:24,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 15:55:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 15:55:24,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:24,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:24,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-11-29 15:55:24,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:24,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:24,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:24,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:24,616 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:24,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-29 15:55:24,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b1f1851/c590b0641e0946bfa60a63677793caa6/FLAGdc25661c9 [2020-11-29 15:55:25,412 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:25,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-29 15:55:25,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b1f1851/c590b0641e0946bfa60a63677793caa6/FLAGdc25661c9 [2020-11-29 15:55:25,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b1f1851/c590b0641e0946bfa60a63677793caa6 [2020-11-29 15:55:25,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:25,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:25,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:25,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:25,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:25,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:25" (1/1) ... [2020-11-29 15:55:25,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44303044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:25, skipping insertion in model container [2020-11-29 15:55:25,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:25" (1/1) ... [2020-11-29 15:55:25,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:25,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:26,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:26,203 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:26,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:26,280 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:26,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26 WrapperNode [2020-11-29 15:55:26,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:26,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:26,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:26,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:26,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:26,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:26,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:26,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:26,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (1/1) ... [2020-11-29 15:55:26,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:26,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:26,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:26,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:26,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (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 [2020-11-29 15:55:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 15:55:26,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:26,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-29 15:55:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 15:55:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:26,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:26,967 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:26,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:26 BoogieIcfgContainer [2020-11-29 15:55:26,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:26,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:26,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:26,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:26,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:25" (1/3) ... [2020-11-29 15:55:26,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e22199d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:26, skipping insertion in model container [2020-11-29 15:55:26,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:26" (2/3) ... [2020-11-29 15:55:26,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e22199d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:26, skipping insertion in model container [2020-11-29 15:55:26,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:26" (3/3) ... [2020-11-29 15:55:26,977 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-11-29 15:55:26,993 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:26,996 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:27,010 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:27,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:27,039 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:27,039 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:27,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:27,040 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:27,040 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:27,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:27,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:27,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:27,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:27,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:27,071 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032895914] [2020-11-29 15:55:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:27,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032895914] [2020-11-29 15:55:27,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:27,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 15:55:27,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337011541] [2020-11-29 15:55:27,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:27,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:27,268 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:27,298 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:27,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:27,311 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:27,312 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:27,315 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 [2020-11-29 15:55:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:27,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:27,357 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:27,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:27,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:27,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:27,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 15:55:27,359 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:27,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:27,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766091193] [2020-11-29 15:55:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766091193] [2020-11-29 15:55:27,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:27,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485018221] [2020-11-29 15:55:27,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:27,456 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-11-29 15:55:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:27,522 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-11-29 15:55:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:27,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 15:55:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:27,525 INFO L225 Difference]: With dead ends: 53 [2020-11-29 15:55:27,525 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 15:55:27,526 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 [2020-11-29 15:55:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 15:55:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-11-29 15:55:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:27,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:27,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:27,534 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:27,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 15:55:27,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:27,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:27,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 15:55:27,536 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:27,537 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-11-29 15:55:27,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:27,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321531879] [2020-11-29 15:55:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:27,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321531879] [2020-11-29 15:55:27,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:27,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621822010] [2020-11-29 15:55:27,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:27,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:27,619 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:27,680 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:27,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 15:55:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:27,682 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:27,682 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:27,685 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 [2020-11-29 15:55:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:27,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:27,691 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-11-29 15:55:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:27,692 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:27,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 15:55:27,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:27,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:27,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 15:55:27,693 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-11-29 15:55:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:27,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303318952] [2020-11-29 15:55:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:27,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303318952] [2020-11-29 15:55:27,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:27,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:27,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151734075] [2020-11-29 15:55:27,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:27,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:27,760 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:27,839 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-11-29 15:55:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:27,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 15:55:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:27,841 INFO L225 Difference]: With dead ends: 57 [2020-11-29 15:55:27,841 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 15:55:27,842 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 [2020-11-29 15:55:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 15:55:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-11-29 15:55:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:27,849 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-11-29 15:55:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:27,850 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:27,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:27,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:27,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:27,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 15:55:27,852 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-11-29 15:55:27,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:27,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946466412] [2020-11-29 15:55:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:27,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946466412] [2020-11-29 15:55:27,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:27,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 15:55:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499325277] [2020-11-29 15:55:27,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 15:55:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:27,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:27,943 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:28,005 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-11-29 15:55:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:28,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:28,007 INFO L225 Difference]: With dead ends: 55 [2020-11-29 15:55:28,007 INFO L226 Difference]: Without dead ends: 46 [2020-11-29 15:55:28,008 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 [2020-11-29 15:55:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-29 15:55:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-11-29 15:55:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:28,014 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-11-29 15:55:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:28,015 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:28,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:28,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:28,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:28,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 15:55:28,017 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:28,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 15:55:28,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652523780] [2020-11-29 15:55:28,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 15:55:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:28,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:28,065 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:28,113 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 15:55:28,114 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 15:55:28,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 15:55:28,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:28 BoogieIcfgContainer [2020-11-29 15:55:28,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:28,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:28,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:28,152 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:28,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:26" (3/4) ... [2020-11-29 15:55:28,156 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 15:55:28,157 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:28,159 INFO L168 Benchmark]: Toolchain (without parser) took 2373.77 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 24.7 MB in the beginning and 34.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:28,160 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.1 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:28,161 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.88 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 24.8 MB in the end (delta: -726.7 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:28,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.03 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 23.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:28,163 INFO L168 Benchmark]: Boogie Preprocessor took 75.88 ms. Allocated memory is still 48.2 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:28,164 INFO L168 Benchmark]: RCFGBuilder took 526.05 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 21.5 MB in the beginning and 37.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:28,165 INFO L168 Benchmark]: TraceAbstraction took 1180.40 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 34.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:28,166 INFO L168 Benchmark]: Witness Printer took 5.49 ms. Allocated memory is still 71.3 MB. Free memory was 34.9 MB in the beginning and 34.6 MB in the end (delta: 341.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:28,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 48.2 MB. Free memory was 30.1 MB in the beginning and 30.1 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 486.88 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 24.8 MB in the end (delta: -726.7 kB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 78.03 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 23.1 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.88 ms. Allocated memory is still 48.2 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 526.05 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 21.5 MB in the beginning and 37.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1180.40 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 34.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.49 ms. Allocated memory is still 71.3 MB. Free memory was 34.9 MB in the beginning and 34.6 MB in the end (delta: 341.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 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=33occurred 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, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 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 0.2.0-0e1a00c [2020-11-29 15:55:30,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 15:55:30,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 15:55:30,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 15:55:30,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 15:55:30,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 15:55:30,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 15:55:30,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 15:55:30,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 15:55:30,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 15:55:30,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 15:55:30,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 15:55:30,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 15:55:30,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 15:55:30,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 15:55:30,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 15:55:30,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 15:55:30,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 15:55:30,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 15:55:30,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 15:55:30,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 15:55:30,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 15:55:30,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 15:55:30,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 15:55:30,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 15:55:30,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 15:55:30,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 15:55:30,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 15:55:30,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 15:55:30,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 15:55:30,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 15:55:30,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 15:55:30,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 15:55:30,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 15:55:30,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 15:55:30,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 15:55:30,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 15:55:30,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 15:55:30,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 15:55:30,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 15:55:30,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 15:55:30,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 15:55:30,914 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 15:55:30,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 15:55:30,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 15:55:30,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 15:55:30,918 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 15:55:30,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 15:55:30,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 15:55:30,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 15:55:30,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 15:55:30,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 15:55:30,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 15:55:30,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 15:55:30,922 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 15:55:30,922 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 15:55:30,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 15:55:30,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 15:55:30,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 15:55:30,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 15:55:30,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 15:55:30,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 15:55:30,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 15:55:30,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 15:55:30,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 15:55:30,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 15:55:30,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 15:55:30,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 15:55:30,926 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 15:55:30,926 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 15:55:30,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 15:55:30,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 15:55:30,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 15:55:30,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb4ea5d2ba4e3ce5c37a1ed90f4b993cc1661a1 [2020-11-29 15:55:31,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 15:55:31,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 15:55:31,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 15:55:31,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 15:55:31,438 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 15:55:31,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-29 15:55:31,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711bc21b0/875dbfce03574f76b92eb43bfcba2960/FLAG77c585b52 [2020-11-29 15:55:32,268 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 15:55:32,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-29 15:55:32,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711bc21b0/875dbfce03574f76b92eb43bfcba2960/FLAG77c585b52 [2020-11-29 15:55:32,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711bc21b0/875dbfce03574f76b92eb43bfcba2960 [2020-11-29 15:55:32,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 15:55:32,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 15:55:32,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:32,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 15:55:32,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 15:55:32,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:32,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c87827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32, skipping insertion in model container [2020-11-29 15:55:32,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:32,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 15:55:32,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 15:55:32,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:32,882 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 15:55:32,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 15:55:32,932 INFO L208 MainTranslator]: Completed translation [2020-11-29 15:55:32,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32 WrapperNode [2020-11-29 15:55:32,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 15:55:32,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:32,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 15:55:32,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 15:55:32,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:32,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:32,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 15:55:32,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 15:55:32,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 15:55:32,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 15:55:32,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:32,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (1/1) ... [2020-11-29 15:55:33,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 15:55:33,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 15:55:33,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 15:55:33,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 15:55:33,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (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 [2020-11-29 15:55:33,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 15:55:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 15:55:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 15:55:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 15:55:33,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 15:55:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-11-29 15:55:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 15:55:33,677 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 15:55:33,678 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-29 15:55:33,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:33 BoogieIcfgContainer [2020-11-29 15:55:33,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 15:55:33,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 15:55:33,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 15:55:33,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 15:55:33,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:55:32" (1/3) ... [2020-11-29 15:55:33,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a588e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:33, skipping insertion in model container [2020-11-29 15:55:33,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:55:32" (2/3) ... [2020-11-29 15:55:33,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a588e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:55:33, skipping insertion in model container [2020-11-29 15:55:33,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:33" (3/3) ... [2020-11-29 15:55:33,691 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-11-29 15:55:33,709 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 15:55:33,713 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 15:55:33,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 15:55:33,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 15:55:33,755 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 15:55:33,755 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 15:55:33,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 15:55:33,756 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 15:55:33,756 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 15:55:33,756 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 15:55:33,756 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 15:55:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-29 15:55:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 15:55:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:33,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:33,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-29 15:55:33,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:33,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552489771] [2020-11-29 15:55:33,803 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 [2020-11-29 15:55:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 15:55:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552489771] [2020-11-29 15:55:34,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:34,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 15:55:34,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61174365] [2020-11-29 15:55:34,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 15:55:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 15:55:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:34,171 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-29 15:55:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:34,200 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-29 15:55:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 15:55:34,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 15:55:34,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:34,220 INFO L225 Difference]: With dead ends: 63 [2020-11-29 15:55:34,220 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 15:55:34,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 15:55:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 15:55:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 15:55:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 15:55:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-29 15:55:34,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-29 15:55:34,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:34,276 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-29 15:55:34,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 15:55:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-29 15:55:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 15:55:34,278 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:34,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:34,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 15:55:34,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-29 15:55:34,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751709513] [2020-11-29 15:55:34,495 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 [2020-11-29 15:55:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751709513] [2020-11-29 15:55:34,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:34,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:34,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954246920] [2020-11-29 15:55:34,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:34,687 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-11-29 15:55:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:34,778 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-29 15:55:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:34,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-29 15:55:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:34,781 INFO L225 Difference]: With dead ends: 68 [2020-11-29 15:55:34,781 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 15:55:34,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 15:55:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 15:55:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-29 15:55:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 15:55:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-29 15:55:34,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-29 15:55:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:34,795 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-29 15:55:34,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-29 15:55:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 15:55:34,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:34,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:35,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 15:55:35,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-29 15:55:35,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:35,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28349571] [2020-11-29 15:55:35,012 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 [2020-11-29 15:55:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28349571] [2020-11-29 15:55:35,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:35,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-29 15:55:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216693048] [2020-11-29 15:55:35,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:35,200 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-11-29 15:55:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:35,259 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-29 15:55:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 15:55:35,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 15:55:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:35,261 INFO L225 Difference]: With dead ends: 52 [2020-11-29 15:55:35,261 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 15:55:35,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 15:55:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 15:55:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 15:55:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 15:55:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-11-29 15:55:35,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-11-29 15:55:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:35,269 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-11-29 15:55:35,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-11-29 15:55:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 15:55:35,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:35,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:35,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 15:55:35,487 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-11-29 15:55:35,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:35,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052513773] [2020-11-29 15:55:35,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 15:55:35,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:35,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052513773] [2020-11-29 15:55:35,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:35,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-29 15:55:35,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713230240] [2020-11-29 15:55:35,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 15:55:35,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 15:55:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 15:55:35,654 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-11-29 15:55:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:35,729 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-11-29 15:55:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 15:55:35,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 15:55:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:35,731 INFO L225 Difference]: With dead ends: 61 [2020-11-29 15:55:35,731 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 15:55:35,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 15:55:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 15:55:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-11-29 15:55:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 15:55:35,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-11-29 15:55:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:35,738 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 15:55:35,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 15:55:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-29 15:55:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:35,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:35,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:35,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 15:55:35,947 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-11-29 15:55:35,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:35,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63970546] [2020-11-29 15:55:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 15:55:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:36,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:36,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63970546] [2020-11-29 15:55:36,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:36,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-29 15:55:36,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017901057] [2020-11-29 15:55:36,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 15:55:36,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 15:55:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:36,105 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-11-29 15:55:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:36,117 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-11-29 15:55:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 15:55:36,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 15:55:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:36,119 INFO L225 Difference]: With dead ends: 38 [2020-11-29 15:55:36,119 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 15:55:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 15:55:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 15:55:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 15:55:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 15:55:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-29 15:55:36,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-11-29 15:55:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:36,126 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-29 15:55:36,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 15:55:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-29 15:55:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 15:55:36,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:36,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:36,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 15:55:36,344 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-11-29 15:55:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:36,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125747216] [2020-11-29 15:55:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 15:55:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:36,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125747216] [2020-11-29 15:55:36,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:36,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-11-29 15:55:36,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347158189] [2020-11-29 15:55:36,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 15:55:36,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:36,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 15:55:36,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 15:55:36,596 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-11-29 15:55:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:36,725 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-11-29 15:55:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 15:55:36,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-29 15:55:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:36,729 INFO L225 Difference]: With dead ends: 40 [2020-11-29 15:55:36,730 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 15:55:36,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-29 15:55:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 15:55:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 15:55:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 15:55:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-29 15:55:36,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-11-29 15:55:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-29 15:55:36,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 15:55:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 15:55:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 15:55:36,747 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:36,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:36,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 15:55:36,963 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-11-29 15:55:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962951917] [2020-11-29 15:55:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 15:55:37,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 15:55:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 15:55:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:37,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 15:55:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 15:55:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962951917] [2020-11-29 15:55:37,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 15:55:37,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 15:55:37,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566976196] [2020-11-29 15:55:37,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 15:55:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 15:55:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 15:55:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 15:55:37,171 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-11-29 15:55:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 15:55:37,226 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 15:55:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 15:55:37,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-29 15:55:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 15:55:37,228 INFO L225 Difference]: With dead ends: 43 [2020-11-29 15:55:37,228 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 15:55:37,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 15:55:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 15:55:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 15:55:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 15:55:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-11-29 15:55:37,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-11-29 15:55:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 15:55:37,233 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-11-29 15:55:37,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 15:55:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-11-29 15:55:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 15:55:37,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 15:55:37,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 15:55:37,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 15:55:37,447 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 15:55:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 15:55:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-11-29 15:55:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 15:55:37,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418980824] [2020-11-29 15:55:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-29 15:55:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:37,599 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 15:55:37,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 15:55:37,758 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 15:55:37,759 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 15:55:37,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 15:55:38,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:55:38 BoogieIcfgContainer [2020-11-29 15:55:38,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 15:55:38,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 15:55:38,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 15:55:38,015 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 15:55:38,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:55:33" (3/4) ... [2020-11-29 15:55:38,018 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 15:55:38,078 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-11-29 15:55:38,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 15:55:38,081 INFO L168 Benchmark]: Toolchain (without parser) took 5468.79 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 39.4 MB in the beginning and 42.8 MB in the end (delta: -3.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,081 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 22.1 MB in the beginning and 22.0 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:38,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.35 ms. Allocated memory is still 62.9 MB. Free memory was 38.7 MB in the beginning and 43.3 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,083 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.90 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 41.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,084 INFO L168 Benchmark]: Boogie Preprocessor took 42.09 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 39.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 15:55:38,084 INFO L168 Benchmark]: RCFGBuilder took 649.47 ms. Allocated memory is still 62.9 MB. Free memory was 39.8 MB in the beginning and 35.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,085 INFO L168 Benchmark]: TraceAbstraction took 4331.87 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 45.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,086 INFO L168 Benchmark]: Witness Printer took 63.59 ms. Allocated memory is still 75.5 MB. Free memory was 45.0 MB in the beginning and 42.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 15:55:38,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 22.1 MB in the beginning and 22.0 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 311.35 ms. Allocated memory is still 62.9 MB. Free memory was 38.7 MB in the beginning and 43.3 MB in the end (delta: -4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.90 ms. Allocated memory is still 62.9 MB. Free memory was 43.1 MB in the beginning and 41.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.09 ms. Allocated memory is still 62.9 MB. Free memory was 41.4 MB in the beginning and 39.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 649.47 ms. Allocated memory is still 62.9 MB. Free memory was 39.8 MB in the beginning and 35.0 MB in the end (delta: 4.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4331.87 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 45.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. * Witness Printer took 63.59 ms. Allocated memory is still 75.5 MB. Free memory was 45.0 MB in the beginning and 42.8 MB in the end (delta: 2.2 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L3] __assert_fail("0", "float_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 175 SDslu, 301 SDs, 0 SdLazy, 100 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7973 SizeOfPredicates, 27 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...