/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_VARIABLES --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_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:27:49,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:49,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:49,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:49,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:49,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:49,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:49,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:49,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:49,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:49,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:49,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:49,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:49,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:49,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:49,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:49,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:49,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:49,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:49,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:49,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:49,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:49,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:49,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:49,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 16:27:49,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 16:27:49,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 16:27:49,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 16:27:49,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 16:27:49,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 16:27:49,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:49,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:49,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:49,715 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 16:27:49,729 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:49,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:49,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:49,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:49,730 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:49,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:49,731 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:49,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:49,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:49,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:49,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:49,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:49,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:49,732 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:49,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:49,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:49,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:49,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:49,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:49,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:49,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:49,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:49,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:49,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:49,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:49,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:49,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:49,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:49,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:49,736 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_VARIABLES 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 16:27:50,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:50,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:50,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:50,032 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:50,033 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:50,033 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-07-20 16:27:50,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7132469/8f985b4a00ee47e799688b46d14f7722/FLAGd1a8aef6b [2020-07-20 16:27:50,601 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:27:50,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-07-20 16:27:50,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7132469/8f985b4a00ee47e799688b46d14f7722/FLAGd1a8aef6b [2020-07-20 16:27:50,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7132469/8f985b4a00ee47e799688b46d14f7722 [2020-07-20 16:27:50,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:27:50,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:27:50,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:50,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:27:50,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:27:50,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:50" (1/1) ... [2020-07-20 16:27:50,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50819e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:50, skipping insertion in model container [2020-07-20 16:27:50,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:50" (1/1) ... [2020-07-20 16:27:50,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:27:50,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:27:51,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:51,224 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:27:51,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:51,368 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:27:51,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51 WrapperNode [2020-07-20 16:27:51,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:51,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:27:51,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:27:51,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:27:51,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (1/1) ... [2020-07-20 16:27:51,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:27:51,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:27:51,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:27:51,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:27:51,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (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 16:27:51,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:27:51,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:27:51,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-07-20 16:27:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-07-20 16:27:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 16:27:51,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:27:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:27:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 16:27:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-07-20 16:27:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 16:27:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 16:27:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 16:27:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 16:27:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-07-20 16:27:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 16:27:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:27:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:27:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:27:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 16:27:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 16:27:51,787 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:27:51,787 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 16:27:51,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:51 BoogieIcfgContainer [2020-07-20 16:27:51,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:27:51,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:27:51,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:27:51,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:27:51,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:27:50" (1/3) ... [2020-07-20 16:27:51,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4578a558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:51, skipping insertion in model container [2020-07-20 16:27:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:51" (2/3) ... [2020-07-20 16:27:51,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4578a558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:51, skipping insertion in model container [2020-07-20 16:27:51,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:51" (3/3) ... [2020-07-20 16:27:51,800 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-07-20 16:27:51,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:27:51,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:27:51,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:27:51,861 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:27:51,861 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:27:51,861 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:27:51,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:27:51,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:27:51,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:27:51,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:27:51,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:27:51,882 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-20 16:27:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:27:51,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:51,890 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 16:27:51,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:51,897 INFO L82 PathProgramCache]: Analyzing trace with hash -411440866, now seen corresponding path program 1 times [2020-07-20 16:27:51,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:51,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057066216] [2020-07-20 16:27:51,907 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 16:27:52,033 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:27:52,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:27:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:27:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:27:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:27:52,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:27:52,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057066216] [2020-07-20 16:27:52,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:27:52,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:27:52,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57045382] [2020-07-20 16:27:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:27:52,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:27:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:27:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:27:52,158 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-07-20 16:27:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:27:52,232 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2020-07-20 16:27:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:27:52,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 16:27:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:27:52,245 INFO L225 Difference]: With dead ends: 83 [2020-07-20 16:27:52,246 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 16:27:52,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:27:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 16:27:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 16:27:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 16:27:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-20 16:27:52,299 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2020-07-20 16:27:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:27:52,299 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-20 16:27:52,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:27:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-20 16:27:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:27:52,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:52,303 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, 1] [2020-07-20 16:27:52,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:52,516 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1766352133, now seen corresponding path program 1 times [2020-07-20 16:27:52,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:52,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686497796] [2020-07-20 16:27:52,520 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 16:27:52,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:27:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:27:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:27:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:27:52,618 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 16:27:52,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:27:52,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686497796] [2020-07-20 16:27:52,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:27:52,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:27:52,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884689818] [2020-07-20 16:27:52,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:27:52,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:27:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:27:52,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:27:52,625 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2020-07-20 16:27:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:27:52,663 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-07-20 16:27:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:27:52,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 16:27:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:27:52,667 INFO L225 Difference]: With dead ends: 63 [2020-07-20 16:27:52,667 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 16:27:52,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:27:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 16:27:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-20 16:27:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 16:27:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-20 16:27:52,688 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-07-20 16:27:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:27:52,690 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-20 16:27:52,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:27:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-20 16:27:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:27:52,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:52,693 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, 1] [2020-07-20 16:27:52,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:52,905 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -30599226, now seen corresponding path program 1 times [2020-07-20 16:27:52,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:52,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960845525] [2020-07-20 16:27:52,908 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:52,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:27:52,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 16:27:52,990 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 16:27:53,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:53,077 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 16:27:53,080 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 16:27:53,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:53,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:27:53 BoogieIcfgContainer [2020-07-20 16:27:53,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:27:53,332 INFO L168 Benchmark]: Toolchain (without parser) took 2378.62 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.4 MB in the beginning and 97.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,333 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.48 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.0 MB in the beginning and 182.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,335 INFO L168 Benchmark]: Boogie Preprocessor took 42.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,336 INFO L168 Benchmark]: RCFGBuilder took 381.25 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 160.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,337 INFO L168 Benchmark]: TraceAbstraction took 1535.89 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 97.4 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:53,341 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 414.48 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.0 MB in the beginning and 182.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.25 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 160.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1535.89 ms. Allocated memory is still 203.9 MB. Free memory was 159.4 MB in the beginning and 97.4 MB in the end (delta: 61.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 64. Possible FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; VAL [y=0] [L66] CALL, EXPR fmin_float(x, y) VAL [\old(x)=4, \old(y)=0] [L36] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4] [L13] __uint32_t w; VAL [\old(x)=4, x=4] [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4, w=2139095041, x=4] [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4, w=2139095041, x=4] [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4, w=2139095041, x=4] [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; VAL [\old(x)=4, \result=0, w=2139095041, x=4] [L36] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4, \old(y)=0, __fpclassify_float(x)=0, x=4, y=0] [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; VAL [\old(x)=4, \old(y)=0, \result=0, x=4, y=0] [L66] RET, EXPR fmin_float(x, y) VAL [fmin_float(x, y)=0, x=4, y=0] [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=0, res == -0.0f && __signbit_float(res) == 1=0, x=4, y=0] [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() VAL [res=0, x=4, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 0 SDslu, 180 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 1434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...