/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:44:31,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:44:31,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:44:31,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:44:31,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:44:31,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:44:31,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:44:31,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:44:31,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:44:31,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:44:31,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:44:31,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:44:31,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:44:31,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:44:31,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:44:31,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:44:31,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:44:31,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:44:31,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:44:31,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:44:31,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:44:31,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:44:31,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:44:31,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:44:31,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:44:31,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:44:31,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:44:31,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:44:31,385 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 15:44:31,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:44:31,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:44:31,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:44:31,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:44:31,406 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:44:31,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:44:31,406 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:44:31,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:44:31,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:44:31,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:44:31,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:44:31,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:44:31,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:44:31,408 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:44:31,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:44:31,408 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:44:31,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:44:31,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:44:31,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:44:31,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:44:31,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:44:31,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:31,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:44:31,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:44:31,411 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 -> NUM_VARIABLES 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 -> 2 [2020-07-21 15:44:31,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:44:31,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:44:31,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:44:31,744 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:44:31,745 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:44:31,747 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c [2020-07-21 15:44:31,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db269af/646f71fcfb1f496db78d5c2204a1e286/FLAG641a29d31 [2020-07-21 15:44:32,273 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:44:32,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1231b.c [2020-07-21 15:44:32,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db269af/646f71fcfb1f496db78d5c2204a1e286/FLAG641a29d31 [2020-07-21 15:44:32,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db269af/646f71fcfb1f496db78d5c2204a1e286 [2020-07-21 15:44:32,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:44:32,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:44:32,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:32,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:44:32,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:44:32,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:32,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81043bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32, skipping insertion in model container [2020-07-21 15:44:32,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:32,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:44:32,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:44:32,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:32,890 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:44:32,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:32,940 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:44:32,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32 WrapperNode [2020-07-21 15:44:32,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:32,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:44:32,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:44:32,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:44:33,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (1/1) ... [2020-07-21 15:44:33,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:44:33,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:44:33,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:44:33,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:44:33,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (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 15:44:33,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:44:33,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:44:33,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-07-21 15:44:33,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2020-07-21 15:44:33,153 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_double [2020-07-21 15:44:33,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:44:33,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:44:33,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 15:44:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 15:44:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_double [2020-07-21 15:44:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:44:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:44:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:44:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 15:44:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 15:44:33,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:44:33,495 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 15:44:33,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:33 BoogieIcfgContainer [2020-07-21 15:44:33,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:44:33,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:44:33,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:44:33,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:44:33,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:44:32" (1/3) ... [2020-07-21 15:44:33,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3ba083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:33, skipping insertion in model container [2020-07-21 15:44:33,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:32" (2/3) ... [2020-07-21 15:44:33,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3ba083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:33, skipping insertion in model container [2020-07-21 15:44:33,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:33" (3/3) ... [2020-07-21 15:44:33,506 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1231b.c [2020-07-21 15:44:33,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:44:33,525 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:44:33,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:44:33,563 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:44:33,563 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:44:33,563 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:44:33,563 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:44:33,563 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:44:33,563 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:44:33,563 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:44:33,564 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:44:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-21 15:44:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:44:33,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:33,585 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, 1] [2020-07-21 15:44:33,586 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash 969227935, now seen corresponding path program 1 times [2020-07-21 15:44:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:33,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262788729] [2020-07-21 15:44:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 15:44:33,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:33,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:33,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:33,803 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 15:44:33,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:33,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262788729] [2020-07-21 15:44:33,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:33,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:33,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632857618] [2020-07-21 15:44:33,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:33,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:33,833 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-07-21 15:44:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:33,890 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2020-07-21 15:44:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:33,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 15:44:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:33,904 INFO L225 Difference]: With dead ends: 73 [2020-07-21 15:44:33,905 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 15:44:33,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 15:44:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-21 15:44:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 15:44:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 15:44:33,961 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2020-07-21 15:44:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:33,962 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 15:44:33,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 15:44:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 15:44:33,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:33,966 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, 1, 1, 1, 1, 1] [2020-07-21 15:44:34,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:34,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash 151786008, now seen corresponding path program 1 times [2020-07-21 15:44:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:34,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138701013] [2020-07-21 15:44:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:44:34,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:34,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:34,292 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 15:44:34,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:34,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138701013] [2020-07-21 15:44:34,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:34,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:34,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561700902] [2020-07-21 15:44:34,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:34,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:34,296 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 4 states. [2020-07-21 15:44:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:34,320 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-07-21 15:44:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:34,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-07-21 15:44:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:34,323 INFO L225 Difference]: With dead ends: 51 [2020-07-21 15:44:34,323 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 15:44:34,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 15:44:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 15:44:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 15:44:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-21 15:44:34,333 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 31 [2020-07-21 15:44:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:34,334 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-21 15:44:34,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-21 15:44:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 15:44:34,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:34,336 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, 1, 1, 1, 1, 1] [2020-07-21 15:44:34,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:34,548 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash -44727497, now seen corresponding path program 1 times [2020-07-21 15:44:34,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:34,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368464587] [2020-07-21 15:44:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 15:44:34,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 15:44:34,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:44:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 15:44:34,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 15:44:34,662 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 15:44:34,663 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 15:44:34,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:34,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:44:34 BoogieIcfgContainer [2020-07-21 15:44:34,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:44:34,913 INFO L168 Benchmark]: Toolchain (without parser) took 2251.32 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.5 MB in the beginning and 96.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,915 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.18 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 92.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,917 INFO L168 Benchmark]: Boogie Preprocessor took 135.58 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,918 INFO L168 Benchmark]: RCFGBuilder took 421.44 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,919 INFO L168 Benchmark]: TraceAbstraction took 1410.78 ms. Allocated memory is still 203.9 MB. Free memory was 161.3 MB in the beginning and 96.2 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:44:34,922 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.18 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 92.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.58 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.44 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1410.78 ms. Allocated memory is still 203.9 MB. Free memory was 161.3 MB in the beginning and 96.2 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 68]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 67, overapproximation of someBinaryArithmeticDOUBLEoperation at line 61. Possible FailurePath: [L60] double x = __VERIFIER_nondet_double(); [L61] double y = 0.0 / 0.0; VAL [x=3] [L62] CALL, EXPR isnan_double(x) VAL [\old(x)=3] [L16] return x != x; VAL [\old(x)=3, \result=0, x=3] [L62] RET, EXPR isnan_double(x) VAL [isnan_double(x)=0, x=3] [L62] COND TRUE !isnan_double(x) [L64] CALL, EXPR fmin_double(x, y) VAL [\old(x)=3, \old(y)=4] [L45] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=3] [L18] __uint32_t msw, lsw; VAL [\old(x)=3, x=3] [L21] ieee_double_shape_type ew_u; [L22] ew_u.value = (x) [L23] EXPR ew_u.parts.msw [L23] (msw) = ew_u.parts.msw [L24] EXPR ew_u.parts.lsw [L24] (lsw) = ew_u.parts.lsw [L27-L28] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=3, lsw=-4294967295, msw=-2148532223, x=3] [L30-L31] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=3, lsw=-4294967295, msw=-2148532223, x=3] [L33-L34] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=3, lsw=-4294967295, msw=-2148532223, x=3] [L37-L38] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L41] return 0; VAL [\old(x)=3, \result=0, lsw=-4294967295, msw=-2148532223, x=3] [L45] RET, EXPR __fpclassify_double(x) VAL [\old(x)=3, \old(y)=4, __fpclassify_double(x)=0, x=3, y=4] [L45] COND TRUE __fpclassify_double(x) == 0 [L46] return y; VAL [\old(x)=3, \old(y)=4, \result=4, x=3, y=4] [L64] RET, EXPR fmin_double(x, y) VAL [fmin_double(x, y)=4, x=3, y=4] [L64] double res = fmin_double(x, y); [L67] COND TRUE res != x VAL [res=4, x=3, y=4] [L68] __VERIFIER_error() VAL [res=4, x=3, y=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 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: 90 SDtfs, 0 SDslu, 168 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 89 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 2024 SizeOfPredicates, 0 NumberOfNonLiveVariables, 138 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...