/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:18,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:18,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:18,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:18,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:18,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:18,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:18,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:18,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:18,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:18,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:18,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:18,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:18,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:18,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:18,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:18,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:18,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:18,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:18,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:18,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:18,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:18,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:18,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:18,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:18,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:18,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:18,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:18,849 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 [2020-07-21 22:02:18,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:18,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:18,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:18,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:18,866 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:18,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:18,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:18,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:18,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:18,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:18,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:18,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:18,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:18,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:18,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:18,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:18,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:18,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:18,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:18,873 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 22:02:19,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:19,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:19,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:19,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:19,198 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:19,198 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c [2020-07-21 22:02:19,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a643e8ff/fd49ee5bf82447e5a9f9ac40d88fd3f4/FLAGa43affa87 [2020-07-21 22:02:19,691 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:19,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052d.c [2020-07-21 22:02:19,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a643e8ff/fd49ee5bf82447e5a9f9ac40d88fd3f4/FLAGa43affa87 [2020-07-21 22:02:20,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a643e8ff/fd49ee5bf82447e5a9f9ac40d88fd3f4 [2020-07-21 22:02:20,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:20,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:20,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:20,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:20,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:20,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31aed35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20, skipping insertion in model container [2020-07-21 22:02:20,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:20,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:20,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:20,299 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:20,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:20,446 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:20,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20 WrapperNode [2020-07-21 22:02:20,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:20,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:20,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:20,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:20,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (1/1) ... [2020-07-21 22:02:20,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:20,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:20,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:20,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:20,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (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 [2020-07-21 22:02:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-21 22:02:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 22:02:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:20,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:20,565 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-21 22:02:20,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:02:20,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 22:02:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:02:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:02:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:02:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 22:02:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 22:02:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:20,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:20,888 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 22:02:20,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:20 BoogieIcfgContainer [2020-07-21 22:02:20,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:20,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:20,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:20,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:20,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:20" (1/3) ... [2020-07-21 22:02:20,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f09416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:20, skipping insertion in model container [2020-07-21 22:02:20,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:20" (2/3) ... [2020-07-21 22:02:20,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f09416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:20, skipping insertion in model container [2020-07-21 22:02:20,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:20" (3/3) ... [2020-07-21 22:02:20,903 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052d.c [2020-07-21 22:02:20,915 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:20,924 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:20,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:20,973 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:20,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:20,974 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:20,974 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:20,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:20,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:20,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:20,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-21 22:02:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 22:02:21,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:21,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:21,005 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2053199230, now seen corresponding path program 1 times [2020-07-21 22:02:21,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:21,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656826986] [2020-07-21 22:02:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-21 22:02:21,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:21,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:02:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:21,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656826986] [2020-07-21 22:02:21,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:21,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:02:21,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791462021] [2020-07-21 22:02:21,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:02:21,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:02:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:02:21,192 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-21 22:02:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:21,221 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-21 22:02:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:02:21,222 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-21 22:02:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:21,233 INFO L225 Difference]: With dead ends: 78 [2020-07-21 22:02:21,233 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 22:02:21,237 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 [2020-07-21 22:02:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 22:02:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-21 22:02:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-21 22:02:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-21 22:02:21,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-21 22:02:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:21,284 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-21 22:02:21,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:02:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-21 22:02:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:02:21,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:21,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:21,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:21,503 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2027240245, now seen corresponding path program 1 times [2020-07-21 22:02:21,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:21,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660325526] [2020-07-21 22:02:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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