/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_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 00:31:06,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:07,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:07,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:07,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:07,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:07,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:07,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:07,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:07,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:07,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:07,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:07,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:07,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:07,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:07,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:07,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:07,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:07,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:07,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:07,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:07,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:07,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:07,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:07,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:07,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:07,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:07,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:07,086 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 00:31:07,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:07,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:07,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:07,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:07,117 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:07,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:07,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:07,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:07,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:07,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:07,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:07,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:07,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:07,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:07,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:07,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:07,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:07,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:07,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:07,120 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:07,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:07,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:07,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:07,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:07,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:07,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:07,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:07,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:07,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:07,122 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 00:31:07,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:07,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:07,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:07,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:07,423 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:07,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-07-21 00:31:07,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1057115/b6a677fe906c40ce9904b1bbe23bcd01/FLAG347c4d8f1 [2020-07-21 00:31:07,915 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:07,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-07-21 00:31:07,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1057115/b6a677fe906c40ce9904b1bbe23bcd01/FLAG347c4d8f1 [2020-07-21 00:31:08,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac1057115/b6a677fe906c40ce9904b1bbe23bcd01 [2020-07-21 00:31:08,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:08,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:08,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:08,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:08,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:08,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9a4349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08, skipping insertion in model container [2020-07-21 00:31:08,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:08,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:08,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:08,573 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:08,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:08,650 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:08,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08 WrapperNode [2020-07-21 00:31:08,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:08,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:08,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:08,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:08,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (1/1) ... [2020-07-21 00:31:08,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:08,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:08,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:08,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:08,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (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 00:31:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:08,923 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-07-21 00:31:08,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 00:31:08,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:08,925 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-07-21 00:31:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 00:31:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 00:31:08,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 00:31:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 00:31:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 00:31:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 00:31:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 00:31:08,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:08,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:09,272 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:09,272 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-07-21 00:31:09,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:09 BoogieIcfgContainer [2020-07-21 00:31:09,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:09,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:09,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:09,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:09,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:08" (1/3) ... [2020-07-21 00:31:09,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78997e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:09, skipping insertion in model container [2020-07-21 00:31:09,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:08" (2/3) ... [2020-07-21 00:31:09,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78997e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:09, skipping insertion in model container [2020-07-21 00:31:09,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:09" (3/3) ... [2020-07-21 00:31:09,284 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-07-21 00:31:09,295 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:09,302 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:09,315 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:09,338 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:09,338 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:09,338 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:09,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:09,339 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:09,339 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:09,339 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:09,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 00:31:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 00:31:09,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:09,365 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 00:31:09,365 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-07-21 00:31:09,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:09,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949738495] [2020-07-21 00:31:09,381 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 00:31:09,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 00:31:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:09,505 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 00:31:09,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:09,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949738495] [2020-07-21 00:31:09,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:09,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 00:31:09,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292908277] [2020-07-21 00:31:09,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 00:31:09,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 00:31:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 00:31:09,532 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-21 00:31:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:09,559 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-07-21 00:31:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 00:31:09,561 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-21 00:31:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:09,570 INFO L225 Difference]: With dead ends: 68 [2020-07-21 00:31:09,570 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 00:31:09,574 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 00:31:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 00:31:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 00:31:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 00:31:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-21 00:31:09,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-07-21 00:31:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:09,616 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-21 00:31:09,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 00:31:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-21 00:31:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:31:09,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:09,618 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 00:31:09,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:09,832 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-07-21 00:31:09,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:09,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518767395] [2020-07-21 00:31:09,835 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 [2020-07-21 00:31:09,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 00:31:09,947 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:31:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 00:31:09,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:31:10,012 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 00:31:10,013 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 00:31:10,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:10,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:31:10 BoogieIcfgContainer [2020-07-21 00:31:10,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:31:10,252 INFO L168 Benchmark]: Toolchain (without parser) took 1978.50 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 103.4 MB in the beginning and 124.2 MB in the end (delta: -20.8 MB). Peak memory consumption was 45.3 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,253 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.46 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,255 INFO L168 Benchmark]: Boogie Preprocessor took 193.31 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.1 MB in the beginning and 182.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,256 INFO L168 Benchmark]: RCFGBuilder took 430.26 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 162.7 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,257 INFO L168 Benchmark]: TraceAbstraction took 971.90 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 124.2 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:10,262 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 377.46 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 193.31 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.1 MB in the beginning and 182.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.26 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 162.7 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 971.90 ms. Allocated memory is still 205.0 MB. Free memory was 162.1 MB in the beginning and 124.2 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = -0.0f; [L63] CALL, EXPR trunc_float(x) VAL [\old(x)=0] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=0, x=0] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=0, exponent_less_127=255, signbit=11797, w=0, x=0] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=0, exponent_less_127=255, signbit=11797, w=0, x=0] [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; VAL [\old(x)=0, exponent_less_127=255, signbit=11797, w=0, x=0] [L63] RET, EXPR trunc_float(x) VAL [trunc_float(x)=2, x=0] [L63] float res = trunc_float(x); [L66] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=2, res == -0.0f && __signbit_float(res) == 1=0, x=0] [L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L67] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 37 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...