/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:43:58,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:43:58,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:43:58,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:43:58,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:43:58,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:43:58,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:43:58,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:43:58,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:43:58,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:43:58,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:43:58,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:43:58,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:43:58,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:43:58,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:43:58,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:43:58,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:43:58,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:43:58,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:43:58,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:43:58,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:43:58,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:43:58,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:43:58,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:43:58,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 11:43:58,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 11:43:58,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 11:43:58,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 11:43:58,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 11:43:58,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 11:43:58,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 11:43:58,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 11:43:58,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 11:43:58,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 11:43:58,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 11:43:58,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 11:43:58,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 11:43:58,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 11:43:58,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:43:58,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:43:58,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:43:58,187 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 [2020-07-17 11:43:58,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:43:58,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:43:58,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:43:58,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:43:58,219 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:43:58,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:43:58,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:43:58,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:43:58,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:43:58,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:43:58,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:43:58,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:43:58,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:43:58,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:43:58,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:43:58,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:43:58,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:43:58,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:43:58,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:43:58,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:43:58,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:43:58,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:43:58,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:43:58,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:43:58,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:43:58,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:43:58,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:43:58,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:43:58,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:43:58,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:43:58,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:43:58,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:43:58,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:43:58,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:43:58,503 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:43:58,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-07-17 11:43:58,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff070f74/838bbcbfe460448d90f82db2541627c5/FLAGf5d9fe49c [2020-07-17 11:43:59,013 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:43:59,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-07-17 11:43:59,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff070f74/838bbcbfe460448d90f82db2541627c5/FLAGf5d9fe49c [2020-07-17 11:43:59,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff070f74/838bbcbfe460448d90f82db2541627c5 [2020-07-17 11:43:59,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:43:59,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:43:59,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:43:59,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:43:59,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:43:59,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562c5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59, skipping insertion in model container [2020-07-17 11:43:59,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:43:59,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:43:59,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:43:59,609 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:43:59,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:43:59,639 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:43:59,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59 WrapperNode [2020-07-17 11:43:59,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:43:59,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:43:59,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:43:59,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:43:59,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (1/1) ... [2020-07-17 11:43:59,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:43:59,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:43:59,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:43:59,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:43:59,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (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 [2020-07-17 11:43:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:43:59,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:43:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 11:43:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 11:43:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 11:43:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:43:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:43:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:43:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:00,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:00,002 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 11:44:00,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:00 BoogieIcfgContainer [2020-07-17 11:44:00,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:00,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:00,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:00,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:00,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:43:59" (1/3) ... [2020-07-17 11:44:00,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8f2117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:00, skipping insertion in model container [2020-07-17 11:44:00,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:43:59" (2/3) ... [2020-07-17 11:44:00,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8f2117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:00, skipping insertion in model container [2020-07-17 11:44:00,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:00" (3/3) ... [2020-07-17 11:44:00,016 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-07-17 11:44:00,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:00,039 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:00,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:00,083 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:00,084 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:00,084 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:00,084 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:00,085 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:00,085 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:00,085 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:00,085 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-17 11:44:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 11:44:00,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:00,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:00,116 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:00,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1796465968, now seen corresponding path program 1 times [2020-07-17 11:44:00,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:00,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588212658] [2020-07-17 11:44:00,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:00,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588212658] [2020-07-17 11:44:00,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:00,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 11:44:00,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43725771] [2020-07-17 11:44:00,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 11:44:00,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 11:44:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 11:44:00,266 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-17 11:44:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:00,289 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-17 11:44:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 11:44:00,291 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 11:44:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:00,299 INFO L225 Difference]: With dead ends: 31 [2020-07-17 11:44:00,299 INFO L226 Difference]: Without dead ends: 12 [2020-07-17 11:44:00,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 11:44:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-17 11:44:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-17 11:44:00,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-17 11:44:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-17 11:44:00,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-17 11:44:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:00,338 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-17 11:44:00,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 11:44:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-17 11:44:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-17 11:44:00,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:00,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:00,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:44:00,340 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:00,340 INFO L82 PathProgramCache]: Analyzing trace with hash -108592084, now seen corresponding path program 1 times [2020-07-17 11:44:00,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:00,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730167485] [2020-07-17 11:44:00,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:44:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:44:00,398 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 11:44:00,398 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 11:44:00,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:44:00,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:44:00 BoogieIcfgContainer [2020-07-17 11:44:00,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:44:00,421 INFO L168 Benchmark]: Toolchain (without parser) took 1011.84 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.9 MB in the beginning and 146.2 MB in the end (delta: -44.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,422 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.00 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,424 INFO L168 Benchmark]: Boogie Preprocessor took 111.88 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,425 INFO L168 Benchmark]: RCFGBuilder took 254.51 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 168.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,425 INFO L168 Benchmark]: TraceAbstraction took 409.97 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 146.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:00,429 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.00 ms. Allocated memory is still 145.2 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.88 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.51 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 168.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 409.97 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 146.2 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 35, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L18] float x = __VERIFIER_nondet_float() ; [L19] float exp = 1.0 ; [L20] float term = 1.0 ; [L21] unsigned int count = 1 ; [L22] float result = 2*(1/(1-x)) ; [L23] int temp ; VAL [count=1, exp=1, term=1, x=3] [L25] COND TRUE 1 [L27] term = term * (x/count) [L28] exp = exp + term [L29] count++ [L31] temp = __VERIFIER_nondet_int() [L32] COND TRUE temp ==0 VAL [count=2, temp=0, x=3] [L35] CALL __VERIFIER_assert( result >= exp ) VAL [\old(cond)=0] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L12] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 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...