/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1051.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:17,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:17,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:17,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:17,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:17,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:17,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:17,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:17,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:17,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:17,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:17,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:17,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:17,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:17,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:17,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:17,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:17,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:17,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:17,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:17,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:17,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:17,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:17,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:17,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:17,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:17,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:17,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:17,231 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 10:45:17,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:17,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:17,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:17,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:17,254 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:17,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:17,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:17,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:17,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:17,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:17,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:17,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:17,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:17,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:17,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:17,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:17,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:17,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:17,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:17,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:17,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:17,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:17,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:17,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:17,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:45:17,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:17,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:17,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:17,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:17,534 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:17,534 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1051.c [2020-07-20 10:45:17,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1f493ad/9337a22f34234670a15dc4aed0ea63e1/FLAG44ab689ff [2020-07-20 10:45:18,051 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:18,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1051.c [2020-07-20 10:45:18,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1f493ad/9337a22f34234670a15dc4aed0ea63e1/FLAG44ab689ff [2020-07-20 10:45:18,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e1f493ad/9337a22f34234670a15dc4aed0ea63e1 [2020-07-20 10:45:18,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:18,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:18,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:18,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:18,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:18,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe42ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18, skipping insertion in model container [2020-07-20 10:45:18,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:18,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:18,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:18,706 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:18,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:18,758 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:18,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18 WrapperNode [2020-07-20 10:45:18,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:18,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:18,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:18,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:18,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (1/1) ... [2020-07-20 10:45:18,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:18,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:18,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:18,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:18,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (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 10:45:18,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:18,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:18,967 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-20 10:45:18,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-20 10:45:18,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:18,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:18,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 10:45:18,968 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-20 10:45:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:18,971 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-20 10:45:18,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:19,253 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:19,254 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 10:45:19,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:19 BoogieIcfgContainer [2020-07-20 10:45:19,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:19,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:19,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:19,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:19,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:18" (1/3) ... [2020-07-20 10:45:19,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a365fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:19, skipping insertion in model container [2020-07-20 10:45:19,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:18" (2/3) ... [2020-07-20 10:45:19,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a365fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:19, skipping insertion in model container [2020-07-20 10:45:19,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:19" (3/3) ... [2020-07-20 10:45:19,268 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1051.c [2020-07-20 10:45:19,281 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:19,289 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:19,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:19,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:19,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:19,335 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:19,335 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:19,335 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:19,335 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:19,336 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:19,336 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-20 10:45:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 10:45:19,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:19,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:19,382 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:19,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1361541252, now seen corresponding path program 1 times [2020-07-20 10:45:19,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:19,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711308343] [2020-07-20 10:45:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:19,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:19,562 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 10:45:19,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:19,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711308343] [2020-07-20 10:45:19,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:19,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:19,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000868914] [2020-07-20 10:45:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:19,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:19,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:19,588 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-07-20 10:45:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:19,618 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-07-20 10:45:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:19,620 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 10:45:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:19,631 INFO L225 Difference]: With dead ends: 70 [2020-07-20 10:45:19,632 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 10:45:19,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 10:45:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 10:45:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 10:45:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-07-20 10:45:19,678 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 22 [2020-07-20 10:45:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:19,678 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-07-20 10:45:19,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-07-20 10:45:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 10:45:19,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:19,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:19,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:19,895 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1541897397, now seen corresponding path program 1 times [2020-07-20 10:45:19,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:19,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90457982] [2020-07-20 10:45:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:20,000 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.