/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.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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:10:41,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:10:41,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:10:41,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:10:41,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:10:41,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:10:41,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:10:41,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:10:41,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:10:41,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:10:41,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:10:41,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:10:41,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:10:41,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:10:41,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:10:41,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:10:41,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:10:41,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:10:41,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:10:41,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:10:41,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:10:41,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:10:41,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:10:41,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:10:41,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:10:41,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:10:41,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:10:41,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:10:41,747 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 01:10:41,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:10:41,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:10:41,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:10:41,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:10:41,785 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:10:41,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:10:41,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:10:41,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:10:41,786 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:10:41,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:10:41,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:10:41,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:10:41,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:10:41,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:10:41,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:10:41,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:10:41,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:10:41,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:10:41,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:10:41,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:10:41,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:10:41,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:10:41,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:10:41,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:10:41,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:10:42,077 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:10:42,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:10:42,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:10:42,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:10:42,095 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:10:42,095 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-07-20 01:10:42,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90737e9a0/11839115c8a64716820ac8db714fa4eb/FLAGd04ac5731 [2020-07-20 01:10:42,593 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:10:42,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-07-20 01:10:42,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90737e9a0/11839115c8a64716820ac8db714fa4eb/FLAGd04ac5731 [2020-07-20 01:10:42,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90737e9a0/11839115c8a64716820ac8db714fa4eb [2020-07-20 01:10:42,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:10:42,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:10:42,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:10:42,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:10:42,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:10:42,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:10:42" (1/1) ... [2020-07-20 01:10:42,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b61bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:42, skipping insertion in model container [2020-07-20 01:10:42,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:10:42" (1/1) ... [2020-07-20 01:10:43,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:10:43,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:10:43,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:10:43,311 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:10:43,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:10:43,476 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:10:43,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43 WrapperNode [2020-07-20 01:10:43,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:10:43,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:10:43,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:10:43,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:10:43,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (1/1) ... [2020-07-20 01:10:43,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:10:43,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:10:43,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:10:43,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:10:43,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (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 01:10:43,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:10:43,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:10:43,614 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-07-20 01:10:43,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 01:10:43,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:10:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:10:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-07-20 01:10:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:10:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 01:10:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:10:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:10:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:10:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 01:10:43,618 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 01:10:43,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:10:43,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:10:43,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:10:43,998 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:10:43,999 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-07-20 01:10:44,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:10:44 BoogieIcfgContainer [2020-07-20 01:10:44,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:10:44,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:10:44,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:10:44,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:10:44,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:10:42" (1/3) ... [2020-07-20 01:10:44,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab572a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:10:44, skipping insertion in model container [2020-07-20 01:10:44,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:10:43" (2/3) ... [2020-07-20 01:10:44,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab572a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:10:44, skipping insertion in model container [2020-07-20 01:10:44,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:10:44" (3/3) ... [2020-07-20 01:10:44,011 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-07-20 01:10:44,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:10:44,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:10:44,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:10:44,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:10:44,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:10:44,068 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:10:44,068 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:10:44,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:10:44,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:10:44,069 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:10:44,069 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:10:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 01:10:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 01:10:44,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:10:44,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:10:44,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:10:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:10:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-07-20 01:10:44,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:10:44,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525594034] [2020-07-20 01:10:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d79ade [2020-07-20 01:10:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:10:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:10:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:10:44,313 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 01:10:44,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525594034] [2020-07-20 01:10:44,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:10:44,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 01:10:44,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747181153] [2020-07-20 01:10:44,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:10:44,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:10:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:10:44,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 01:10:44,341 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-07-20 01:10:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:10:44,525 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-07-20 01:10:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:10:44,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 01:10:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:10:44,536 INFO L225 Difference]: With dead ends: 68 [2020-07-20 01:10:44,537 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 01:10:44,540 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 [2020-07-20 01:10:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 01:10:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 01:10:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 01:10:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 01:10:44,577 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-07-20 01:10:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:10:44,577 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 01:10:44,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:10:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 01:10:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:10:44,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:10:44,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:10:44,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:10:44,580 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:10:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:10:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-07-20 01:10:44,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:10:44,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679067776] [2020-07-20 01:10:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d79ade [2020-07-20 01:10:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:10:44,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:10:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:10:44,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:10:44,781 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:10:44,782 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:10:44,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:10:44,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:10:44 BoogieIcfgContainer [2020-07-20 01:10:44,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:10:44,848 INFO L168 Benchmark]: Toolchain (without parser) took 1863.31 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.5 MB in the beginning and 115.4 MB in the end (delta: -12.9 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,849 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 490.97 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 182.4 MB in the end (delta: -80.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,852 INFO L168 Benchmark]: Boogie Preprocessor took 62.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,853 INFO L168 Benchmark]: RCFGBuilder took 463.30 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 160.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,854 INFO L168 Benchmark]: TraceAbstraction took 832.51 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 115.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:10:44,862 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 138.9 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 490.97 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 182.4 MB in the end (delta: -80.3 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.15 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.30 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 160.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 832.51 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 115.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = -0.0f; [L63] CALL, EXPR trunc_float(x) VAL [\old(x)=8589934595] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=8589934595, x=8589934595] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=8589934595, exponent_less_127=255, signbit=-2, w=-1, x=8589934595] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=8589934595, exponent_less_127=255, signbit=-2, w=-1, x=8589934595] [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; VAL [\old(x)=8589934595, exponent_less_127=255, signbit=-2, w=-1, x=8589934595] [L63] RET, EXPR trunc_float(x) VAL [trunc_float(x)=8589934592, x=8589934595] [L63] float res = trunc_float(x); [L66] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=8589934592, res == -0.0f && __signbit_float(res) == 1=0, x=8589934595] [L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L67] __VERIFIER_error() VAL [res=8589934592, x=8589934595] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 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: 34 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s 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=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 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...