/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 DAGSIZE --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/double_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:34,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:34,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:34,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:34,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:34,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:34,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:34,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:34,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:34,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:34,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:34,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:34,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:34,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:34,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:34,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:34,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:34,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:34,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:34,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:34,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:34,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:34,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:34,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:34,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:34,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:34,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:34,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:34,149 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 21:07:34,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:34,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:34,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:34,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:34,171 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:34,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:34,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:34,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:34,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:34,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:34,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:34,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:34,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:34,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:34,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:34,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:34,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:34,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:34,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:34,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:34,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:34,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:34,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:34,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:34,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:34,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:34,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:34,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:34,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:34,176 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 -> DAGSIZE 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 [2020-07-20 21:07:34,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:07:34,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:07:34,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:07:34,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:07:34,461 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:07:34,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-07-20 21:07:34,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d40cc80/4d5e4e0c27e041b5887d46b0b71be550/FLAGe055ec4f9 [2020-07-20 21:07:34,963 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:07:34,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-07-20 21:07:34,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d40cc80/4d5e4e0c27e041b5887d46b0b71be550/FLAGe055ec4f9 [2020-07-20 21:07:35,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d40cc80/4d5e4e0c27e041b5887d46b0b71be550 [2020-07-20 21:07:35,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:07:35,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:07:35,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:35,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:07:35,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:07:35,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230ce35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35, skipping insertion in model container [2020-07-20 21:07:35,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:07:35,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:07:35,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:35,623 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:07:35,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:35,774 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:07:35,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35 WrapperNode [2020-07-20 21:07:35,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:35,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:07:35,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:07:35,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:07:35,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (1/1) ... [2020-07-20 21:07:35,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:07:35,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:07:35,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:07:35,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:07:35,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (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 21:07:35,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:07:35,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:07:35,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-07-20 21:07:35,875 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2020-07-20 21:07:35,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-07-20 21:07:35,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:07:35,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:07:35,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 21:07:35,875 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2020-07-20 21:07:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-07-20 21:07:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:07:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:07:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:07:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 21:07:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:07:36,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:07:36,241 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 21:07:36,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:36 BoogieIcfgContainer [2020-07-20 21:07:36,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:07:36,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:07:36,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:07:36,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:07:36,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:35" (1/3) ... [2020-07-20 21:07:36,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4101f0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:36, skipping insertion in model container [2020-07-20 21:07:36,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:35" (2/3) ... [2020-07-20 21:07:36,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4101f0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:36, skipping insertion in model container [2020-07-20 21:07:36,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:36" (3/3) ... [2020-07-20 21:07:36,264 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-07-20 21:07:36,274 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:07:36,283 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:07:36,296 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:07:36,319 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:07:36,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:07:36,319 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:07:36,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:07:36,319 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:07:36,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:07:36,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:07:36,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:07:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-20 21:07:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:07:36,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:36,343 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 21:07:36,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash -592398611, now seen corresponding path program 1 times [2020-07-20 21:07:36,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:36,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534845508] [2020-07-20 21:07:36,357 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 [2020-07-20 21:07:36,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:07:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:36,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:07:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:36,536 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 21:07:36,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:36,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534845508] [2020-07-20 21:07:36,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:36,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:07:36,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29594910] [2020-07-20 21:07:36,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:07:36,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:07:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:07:36,567 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-07-20 21:07:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:36,665 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2020-07-20 21:07:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:07:36,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 21:07:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:36,681 INFO L225 Difference]: With dead ends: 83 [2020-07-20 21:07:36,681 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 21:07:36,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:07:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 21:07:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 21:07:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 21:07:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-20 21:07:36,761 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2020-07-20 21:07:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:36,761 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-20 21:07:36,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:07:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-20 21:07:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:07:36,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:36,764 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, 1, 1, 1] [2020-07-20 21:07:36,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:36,979 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1003466516, now seen corresponding path program 1 times [2020-07-20 21:07:36,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:36,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017933148] [2020-07-20 21:07:36,982 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 [2020-07-20 21:07:37,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:07:37,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:07:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:37,070 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 21:07:37,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:37,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017933148] [2020-07-20 21:07:37,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:37,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 21:07:37,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348318731] [2020-07-20 21:07:37,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 21:07:37,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:37,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 21:07:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:07:37,075 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2020-07-20 21:07:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:37,099 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-07-20 21:07:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 21:07:37,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 21:07:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:37,101 INFO L225 Difference]: With dead ends: 63 [2020-07-20 21:07:37,101 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 21:07:37,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 21:07:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 21:07:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-07-20 21:07:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 21:07:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-20 21:07:37,112 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2020-07-20 21:07:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:37,113 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-20 21:07:37,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 21:07:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-20 21:07:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 21:07:37,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:37,114 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, 1, 1, 1] [2020-07-20 21:07:37,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:37,328 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -793484843, now seen corresponding path program 1 times [2020-07-20 21:07:37,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:37,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477445644] [2020-07-20 21:07:37,331 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:37,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:07:37,398 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:07:37,418 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:37,441 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:07:37,441 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:07:37,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:37,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:07:37 BoogieIcfgContainer [2020-07-20 21:07:37,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:07:37,697 INFO L168 Benchmark]: Toolchain (without parser) took 2339.48 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 103.2 MB in the beginning and 98.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,699 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.62 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.8 MB in the beginning and 183.5 MB in the end (delta: -80.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,703 INFO L168 Benchmark]: Boogie Preprocessor took 40.33 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,705 INFO L168 Benchmark]: RCFGBuilder took 429.66 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 160.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,711 INFO L168 Benchmark]: TraceAbstraction took 1437.75 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 98.0 MB in the end (delta: 62.0 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:37,723 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 417.62 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.8 MB in the beginning and 183.5 MB in the end (delta: -80.7 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.33 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.66 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 160.6 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1437.75 ms. Allocated memory is still 204.5 MB. Free memory was 160.0 MB in the beginning and 98.0 MB in the end (delta: 62.0 MB). Peak memory consumption was 62.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 85]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 84, overapproximation of someUnaryDOUBLEoperation at line 80. Possible FailurePath: [L79] double x = 0.0; [L80] double y = -0.0; VAL [x=0] [L81] CALL, EXPR fmax_double(x, y) VAL [\old(x)=0, \old(y)=4] [L52] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0] [L24] __uint32_t msw, lsw; VAL [\old(x)=0, x=0] [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (msw) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lsw) = ew_u.parts.lsw [L33-L34] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=0, lsw=8855, msw=-2147483649, x=0] [L36-L37] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=0, lsw=8855, msw=-2147483649, x=0] [L39-L40] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=0, lsw=8855, msw=-2147483649, x=0] [L43-L44] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L47] return 0; VAL [\old(x)=0, \result=0, lsw=8855, msw=-2147483649, x=0] [L52] RET, EXPR __fpclassify_double(x) VAL [\old(x)=0, \old(y)=4, __fpclassify_double(x)=0, x=0, y=4] [L52] COND TRUE __fpclassify_double(x) == 0 [L53] return y; VAL [\old(x)=0, \old(y)=4, \result=4, x=0, y=4] [L81] RET, EXPR fmax_double(x, y) VAL [fmax_double(x, y)=4, x=0, y=4] [L81] double res = fmax_double(x, y); [L84] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=4, res == 0.0 && __signbit_double(res) == 0=0, x=0, y=4] [L84] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L85] __VERIFIER_error() VAL [res=4, x=0, y=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 0 SDslu, 180 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 1434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...