/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:20,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:20,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:20,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:20,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:20,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:20,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:20,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:20,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:20,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:20,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:20,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:20,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:20,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:20,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:20,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:20,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:20,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:20,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:20,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:20,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:20,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:20,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:20,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:20,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:06:20,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:06:20,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:06:20,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:06:20,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:06:20,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:06:20,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:06:20,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:06:20,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:06:20,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:06:21,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:06:21,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:06:21,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:06:21,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:06:21,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:21,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:21,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:21,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:06:21,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:21,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:21,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:21,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:21,033 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:21,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:21,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:21,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:21,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:21,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:21,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:21,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:21,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:21,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:21,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:21,037 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:21,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:21,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:21,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:21,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:21,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:21,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:21,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:21,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:21,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:21,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:21,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:21,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:21,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:21,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:21,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:21,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:21,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:21,382 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:21,383 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:21,384 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-07-20 13:06:21,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0bcdf75/ca3d6f0e21a2475790b9aa211eb25f3f/FLAG82450c1de [2020-07-20 13:06:21,953 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:21,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-07-20 13:06:21,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0bcdf75/ca3d6f0e21a2475790b9aa211eb25f3f/FLAG82450c1de [2020-07-20 13:06:22,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0bcdf75/ca3d6f0e21a2475790b9aa211eb25f3f [2020-07-20 13:06:22,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:22,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:22,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:22,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:22,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:22,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b496ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22, skipping insertion in model container [2020-07-20 13:06:22,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:22,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:22,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:22,539 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:22,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:22,590 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:22,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22 WrapperNode [2020-07-20 13:06:22,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:22,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:22,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:22,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:22,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (1/1) ... [2020-07-20 13:06:22,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:22,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:22,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:22,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:22,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (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 [2020-07-20 13:06:22,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:22,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:22,800 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2020-07-20 13:06:22,800 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-20 13:06:22,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:22,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:22,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 13:06:22,802 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2020-07-20 13:06:22,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:06:22,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 13:06:22,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:06:22,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:06:22,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:06:22,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 13:06:22,804 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-20 13:06:22,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:23,117 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:23,118 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 13:06:23,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:23 BoogieIcfgContainer [2020-07-20 13:06:23,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:23,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:23,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:23,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:23,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:22" (1/3) ... [2020-07-20 13:06:23,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782f3cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:23, skipping insertion in model container [2020-07-20 13:06:23,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:22" (2/3) ... [2020-07-20 13:06:23,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782f3cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:23, skipping insertion in model container [2020-07-20 13:06:23,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:23" (3/3) ... [2020-07-20 13:06:23,141 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2020-07-20 13:06:23,150 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:23,157 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:23,170 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:23,194 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:23,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:23,195 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:23,195 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:23,195 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:23,195 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:23,195 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:23,196 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 13:06:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 13:06:23,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:23,221 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] [2020-07-20 13:06:23,222 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash 247190453, now seen corresponding path program 1 times [2020-07-20 13:06:23,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:23,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293925410] [2020-07-20 13:06:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:23,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:23,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 13:06:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:23,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:23,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293925410] [2020-07-20 13:06:23,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:23,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 13:06:23,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582346661] [2020-07-20 13:06:23,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 13:06:23,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:23,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 13:06:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:23,398 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-20 13:06:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:23,424 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-20 13:06:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:06:23,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 13:06:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:23,437 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:06:23,437 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 13:06:23,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 13:06:23,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 13:06:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:06:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2020-07-20 13:06:23,479 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 22 [2020-07-20 13:06:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:23,479 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2020-07-20 13:06:23,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 13:06:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2020-07-20 13:06:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:06:23,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:23,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:23,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:23,688 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:23,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash 730707327, now seen corresponding path program 1 times [2020-07-20 13:06:23,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:23,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681150518] [2020-07-20 13:06:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:23,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:06:23,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:06:23,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:23,847 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:06:23,847 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:06:24,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:24,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:24 BoogieIcfgContainer [2020-07-20 13:06:24,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:06:24,093 INFO L168 Benchmark]: Toolchain (without parser) took 1784.11 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 103.0 MB in the beginning and 118.8 MB in the end (delta: -15.7 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,094 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.66 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,097 INFO L168 Benchmark]: Boogie Preprocessor took 146.68 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 178.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,098 INFO L168 Benchmark]: RCFGBuilder took 384.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 161.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,099 INFO L168 Benchmark]: TraceAbstraction took 959.39 ms. Allocated memory is still 200.8 MB. Free memory was 160.4 MB in the beginning and 118.8 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:24,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.66 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.68 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 178.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 161.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 959.39 ms. Allocated memory is still 200.8 MB. Free memory was 160.4 MB in the beginning and 118.8 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 49]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 33, overapproximation of bitwiseOr at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L43] float x = 0.0f / 0.0f; [L44] float y = __VERIFIER_nondet_float(); [L45] CALL, EXPR copysign_float(x, y) VAL [\old(x)=9, \old(y)=8] [L13] __uint32_t ix, iy; VAL [\old(x)=9, \old(y)=8, x=9, y=8] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (ix) = gf_u.word [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (y) [L22] EXPR gf_u.word [L22] (iy) = gf_u.word [L25] ieee_float_shape_type sf_u; [L26] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) [L27] EXPR sf_u.value [L27] (x) = sf_u.value [L29] return x; VAL [\old(x)=9, \old(y)=8, \result=0, ix=9, iy=12, x=0, y=8] [L45] RET, EXPR copysign_float(x, y) VAL [copysign_float(x, y)=0, x=9, y=8] [L45] float res = copysign_float(x, y); [L48] CALL, EXPR isnan_float(res) VAL [\old(x)=0] [L33] return x != x; VAL [\old(x)=0, \result=0, x=0] [L48] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=0, x=9, y=8] [L48] COND TRUE !isnan_float(res) [L49] __VERIFIER_error() VAL [res=0, x=9, y=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 47 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...