/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_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:20,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:20,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:20,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:20,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:20,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:20,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:20,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:20,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:20,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:20,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:20,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:20,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:20,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:20,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:20,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:20,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:20,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:20,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:20,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:20,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:20,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:20,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:20,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:20,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:20,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:20,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:20,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:20,962 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 10:45:20,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:20,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:20,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:20,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:20,979 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:20,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:20,979 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:20,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:20,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:20,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:20,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:20,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:20,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:20,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:20,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:20,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:20,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:20,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:20,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:20,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:20,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:20,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:20,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:20,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:20,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:20,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:20,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:20,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:20,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:20,984 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 10:45:21,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:21,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:21,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:21,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:21,273 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:21,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-07-20 10:45:21,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af48f101c/181039cff84a4858af6967fab85f07cb/FLAG8f393ef4f [2020-07-20 10:45:21,817 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:21,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-07-20 10:45:21,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af48f101c/181039cff84a4858af6967fab85f07cb/FLAG8f393ef4f [2020-07-20 10:45:22,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af48f101c/181039cff84a4858af6967fab85f07cb [2020-07-20 10:45:22,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:22,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:22,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:22,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:22,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:22,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f2303c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22, skipping insertion in model container [2020-07-20 10:45:22,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:22,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:22,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:22,416 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:22,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:22,466 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:22,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22 WrapperNode [2020-07-20 10:45:22,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:22,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:22,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:22,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:22,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (1/1) ... [2020-07-20 10:45:22,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:22,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:22,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:22,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:22,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (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 10:45:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-07-20 10:45:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 10:45:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:22,684 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-07-20 10:45:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:22,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 10:45:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:22,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:23,061 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:23,061 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 10:45:23,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:23 BoogieIcfgContainer [2020-07-20 10:45:23,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:23,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:23,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:23,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:23,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:22" (1/3) ... [2020-07-20 10:45:23,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df8b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:23, skipping insertion in model container [2020-07-20 10:45:23,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:22" (2/3) ... [2020-07-20 10:45:23,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20df8b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:23, skipping insertion in model container [2020-07-20 10:45:23,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:23" (3/3) ... [2020-07-20 10:45:23,075 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2020-07-20 10:45:23,084 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:23,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:23,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:23,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:23,123 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:23,123 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:23,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:23,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:23,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:23,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:23,124 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 10:45:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 10:45:23,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:23,148 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 10:45:23,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash 263185431, now seen corresponding path program 1 times [2020-07-20 10:45:23,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:23,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616512960] [2020-07-20 10:45:23,162 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 10:45:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:23,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:23,276 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 10:45:23,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:23,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616512960] [2020-07-20 10:45:23,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:23,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:23,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357431961] [2020-07-20 10:45:23,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:23,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:23,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:23,303 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 10:45:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:23,333 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-20 10:45:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:23,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-20 10:45:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:23,345 INFO L225 Difference]: With dead ends: 78 [2020-07-20 10:45:23,345 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 10:45:23,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 10:45:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 10:45:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 10:45:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 10:45:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 10:45:23,391 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-20 10:45:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:23,392 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 10:45:23,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 10:45:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 10:45:23,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:23,394 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 10:45:23,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:23,610 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1491196875, now seen corresponding path program 1 times [2020-07-20 10:45:23,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:23,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993124656] [2020-07-20 10:45:23,611 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 10:45:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:23,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.