/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:52:56,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:52:56,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:52:56,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:52:56,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:52:56,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:52:56,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:52:56,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:52:56,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:52:56,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:52:56,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:52:56,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:52:56,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:52:56,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:52:56,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:52:56,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:52:56,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:52:56,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:52:56,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:52:56,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:52:56,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:52:56,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:52:56,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:52:56,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:52:56,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:52:56,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:52:56,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:52:56,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:52:56,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:52:56,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:52:56,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:52:56,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:52:56,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:52:56,237 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 [2020-08-21 14:52:56,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:52:56,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:52:56,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:52:56,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:52:56,261 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:52:56,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:52:56,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:52:56,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:52:56,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:52:56,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:52:56,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:52:56,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:52:56,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:52:56,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:52:56,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:52:56,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:52:56,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:52:56,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:52:56,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:52:56,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:52:56,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:52:56,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:52:56,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:52:56,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:52:56,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:52:56,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:52:56,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:52:56,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:52:56,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:52:56,266 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:52:56,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:52:56,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:52:56,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:52:56,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:52:56,591 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:52:56,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 14:52:56,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b4df3360/5d86f96638ed4d0b830780d4ff0548aa/FLAG6a29bd139 [2020-08-21 14:52:57,114 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:52:57,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 14:52:57,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b4df3360/5d86f96638ed4d0b830780d4ff0548aa/FLAG6a29bd139 [2020-08-21 14:52:57,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3b4df3360/5d86f96638ed4d0b830780d4ff0548aa [2020-08-21 14:52:57,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:52:57,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:52:57,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:57,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:52:57,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:52:57,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f98ced9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57, skipping insertion in model container [2020-08-21 14:52:57,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:52:57,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:52:57,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:57,782 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:52:57,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:57,943 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:52:57,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57 WrapperNode [2020-08-21 14:52:57,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:57,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:52:57,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:52:57,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:52:57,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:57,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:58,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (1/1) ... [2020-08-21 14:52:58,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:52:58,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:52:58,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:52:58,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:52:58,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (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 [2020-08-21 14:52:58,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:52:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:52:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-21 14:52:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 14:52:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:52:58,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:52:58,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 14:52:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-21 14:52:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:52:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 14:52:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:52:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:52:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 14:52:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:52:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 14:52:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:52:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:52:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-21 14:52:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:52:58,540 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:52:58,540 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-21 14:52:58,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:58 BoogieIcfgContainer [2020-08-21 14:52:58,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:52:58,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:52:58,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:52:58,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:52:58,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:52:57" (1/3) ... [2020-08-21 14:52:58,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38af090b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:58, skipping insertion in model container [2020-08-21 14:52:58,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:57" (2/3) ... [2020-08-21 14:52:58,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38af090b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:58, skipping insertion in model container [2020-08-21 14:52:58,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:58" (3/3) ... [2020-08-21 14:52:58,554 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-21 14:52:58,566 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:52:58,574 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:52:58,588 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:52:58,615 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:52:58,615 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:52:58,616 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:52:58,616 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:52:58,616 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:52:58,616 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:52:58,617 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:52:58,617 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:52:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 14:52:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:52:58,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:58,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:52:58,650 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:58,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-21 14:52:58,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:58,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348918895] [2020-08-21 14:52:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:58,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:52:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:58,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 14:52:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:52:58,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348918895] [2020-08-21 14:52:58,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:52:58,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:52:58,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939749483] [2020-08-21 14:52:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:52:58,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:52:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:52:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:52:58,954 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 14:52:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:52:59,208 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-21 14:52:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:52:59,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 14:52:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:52:59,221 INFO L225 Difference]: With dead ends: 116 [2020-08-21 14:52:59,222 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 14:52:59,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:52:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 14:52:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-21 14:52:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 14:52:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-21 14:52:59,277 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-21 14:52:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:52:59,278 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-21 14:52:59,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:52:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-21 14:52:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:52:59,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:59,280 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] [2020-08-21 14:52:59,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:52:59,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-21 14:52:59,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:59,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103021694] [2020-08-21 14:52:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:52:59,352 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:52:59,352 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:52:59,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:52:59,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:52:59 BoogieIcfgContainer [2020-08-21 14:52:59,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:52:59,378 INFO L168 Benchmark]: Toolchain (without parser) took 1877.50 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 94.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,379 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.85 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 178.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,382 INFO L168 Benchmark]: Boogie Preprocessor took 61.17 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,382 INFO L168 Benchmark]: RCFGBuilder took 539.53 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 148.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,383 INFO L168 Benchmark]: TraceAbstraction took 829.04 ms. Allocated memory is still 202.4 MB. Free memory was 147.4 MB in the beginning and 94.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:59,388 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 442.85 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 178.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.17 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 539.53 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 148.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 829.04 ms. Allocated memory is still 202.4 MB. Free memory was 147.4 MB in the beginning and 94.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 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 bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [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] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 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...