/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:17:40,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:17:40,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:17:40,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:17:40,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:17:40,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:17:40,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:17:40,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:17:40,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:17:40,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:17:40,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:17:40,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:17:40,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:17:40,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:17:40,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:17:40,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:17:40,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:17:40,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:17:40,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:17:40,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:17:40,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:17:40,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:17:40,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:17:40,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:17:40,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 00:17:40,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 00:17:40,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 00:17:40,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 00:17:40,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 00:17:40,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 00:17:40,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:17:40,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:17:40,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:17:40,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:17:40,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:17:40,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:17:40,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:17:40,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:17:40,739 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:17:40,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:17:40,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:17:40,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:17:40,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:17:40,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:17:40,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:17:40,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:17:40,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:17:40,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:17:40,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:17:40,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:17:40,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:17:40,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:17:40,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:17:40,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:17:40,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:17:40,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:17:40,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:17:40,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:17:40,746 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:17:41,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:17:41,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:17:41,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:17:41,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:17:41,099 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:17:41,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-19 00:17:41,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410ae7db9/72e79b7bed3044a3b6ac6b70f86b0683/FLAG6bc209637 [2020-08-19 00:17:41,637 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:17:41,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-19 00:17:41,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410ae7db9/72e79b7bed3044a3b6ac6b70f86b0683/FLAG6bc209637 [2020-08-19 00:17:42,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/410ae7db9/72e79b7bed3044a3b6ac6b70f86b0683 [2020-08-19 00:17:42,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:17:42,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:17:42,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:42,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:17:42,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:17:42,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425c36b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42, skipping insertion in model container [2020-08-19 00:17:42,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:17:42,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:17:42,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:42,294 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:17:42,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:42,446 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:17:42,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42 WrapperNode [2020-08-19 00:17:42,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:42,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:17:42,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:17:42,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:17:42,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... [2020-08-19 00:17:42,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:17:42,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:17:42,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:17:42,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:17:42,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 00:17:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:17:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:17:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-19 00:17:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-08-19 00:17:42,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:17:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:17:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-19 00:17:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-19 00:17:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 00:17:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 00:17:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 00:17:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 00:17:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 00:17:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 00:17:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-08-19 00:17:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:17:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:17:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-19 00:17:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:17:43,075 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:17:43,076 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-19 00:17:43,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:43 BoogieIcfgContainer [2020-08-19 00:17:43,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:17:43,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:17:43,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:17:43,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:17:43,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:17:42" (1/3) ... [2020-08-19 00:17:43,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff55fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:43, skipping insertion in model container [2020-08-19 00:17:43,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:42" (2/3) ... [2020-08-19 00:17:43,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aff55fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:43, skipping insertion in model container [2020-08-19 00:17:43,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:43" (3/3) ... [2020-08-19 00:17:43,093 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-08-19 00:17:43,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:17:43,112 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:17:43,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:17:43,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:17:43,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:17:43,152 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:17:43,153 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:17:43,153 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:17:43,153 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:17:43,153 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:17:43,153 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:17:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-08-19 00:17:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:17:43,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:43,180 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] [2020-08-19 00:17:43,181 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-08-19 00:17:43,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:43,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239498295] [2020-08-19 00:17:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:43,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 00:17:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:43,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-19 00:17:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:17:43,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239498295] [2020-08-19 00:17:43,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:17:43,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 00:17:43,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192925983] [2020-08-19 00:17:43,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 00:17:43,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 00:17:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 00:17:43,482 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 4 states. [2020-08-19 00:17:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:43,735 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-08-19 00:17:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:17:43,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-19 00:17:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:43,748 INFO L225 Difference]: With dead ends: 112 [2020-08-19 00:17:43,749 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 00:17:43,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:17:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 00:17:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-19 00:17:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-19 00:17:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-19 00:17:43,808 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-08-19 00:17:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:43,809 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-19 00:17:43,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 00:17:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-19 00:17:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 00:17:43,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:43,811 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, 1, 1] [2020-08-19 00:17:43,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:17:43,812 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-08-19 00:17:43,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:43,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254999775] [2020-08-19 00:17:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 00:17:43,976 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 00:17:43,976 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 00:17:43,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:17:44,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:17:44 BoogieIcfgContainer [2020-08-19 00:17:44,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:17:44,033 INFO L168 Benchmark]: Toolchain (without parser) took 2006.32 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.6 MB in the beginning and 92.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 71.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,034 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 422.03 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.2 MB in the beginning and 177.9 MB in the end (delta: -76.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,037 INFO L168 Benchmark]: Boogie Preprocessor took 54.66 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,038 INFO L168 Benchmark]: RCFGBuilder took 577.86 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 147.2 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,039 INFO L168 Benchmark]: TraceAbstraction took 946.28 ms. Allocated memory is still 201.3 MB. Free memory was 146.5 MB in the beginning and 92.6 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-08-19 00:17:44,043 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 422.03 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 101.2 MB in the beginning and 177.9 MB in the end (delta: -76.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.66 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 577.86 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 147.2 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 946.28 ms. Allocated memory is still 201.3 MB. Free memory was 146.5 MB in the beginning and 92.6 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; [L129] CALL isfinite_float(x) [L109] __int32_t ix; [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); [L129] RET isfinite_float(x) [L129] COND TRUE isfinite_float(x) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] COND TRUE res != x [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 6 SDslu, 63 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1656 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...