/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1012b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:15:07,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:15:07,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:15:07,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:15:07,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:15:07,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:15:07,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:15:07,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:15:07,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:15:07,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:15:07,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:15:07,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:15:07,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:15:07,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:15:07,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:15:07,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:15:07,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:15:07,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:15:07,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:15:07,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:15:07,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:15:07,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:15:07,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:15:07,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:15:07,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:15:07,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:15:07,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:15:07,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:15:07,475 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 19:15:07,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:15:07,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:15:07,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:15:07,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:15:07,499 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:15:07,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:15:07,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:15:07,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:15:07,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:15:07,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:15:07,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:15:07,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:15:07,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:15:07,501 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:15:07,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:15:07,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:15:07,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:15:07,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:15:07,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:15:07,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:15:07,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:15:07,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:07,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:15:07,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:15:07,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:15:07,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:15:07,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:07,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:15:07,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:15:07,506 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 -> 2 [2020-07-21 19:15:07,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:15:07,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:15:07,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:15:07,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:15:07,825 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:15:07,826 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1012b.c [2020-07-21 19:15:07,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6265bc409/5a534f8efed74e7680e7c39276ef47f6/FLAG4e15b3fe3 [2020-07-21 19:15:08,391 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:15:08,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1012b.c [2020-07-21 19:15:08,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6265bc409/5a534f8efed74e7680e7c39276ef47f6/FLAG4e15b3fe3 [2020-07-21 19:15:08,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6265bc409/5a534f8efed74e7680e7c39276ef47f6 [2020-07-21 19:15:08,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:15:08,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:15:08,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:08,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:15:08,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:15:08,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520ecaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08, skipping insertion in model container [2020-07-21 19:15:08,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:15:08,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:15:09,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:09,012 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:15:09,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:09,056 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:15:09,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09 WrapperNode [2020-07-21 19:15:09,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:09,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:15:09,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:15:09,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:15:09,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (1/1) ... [2020-07-21 19:15:09,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:15:09,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:15:09,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:15:09,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:15:09,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (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 19:15:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:15:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:15:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-07-21 19:15:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-07-21 19:15:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:15:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:15:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-07-21 19:15:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 19:15:09,265 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-07-21 19:15:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:15:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:15:09,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:15:09,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:15:09,600 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 19:15:09,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:09 BoogieIcfgContainer [2020-07-21 19:15:09,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:15:09,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:15:09,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:15:09,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:15:09,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:15:08" (1/3) ... [2020-07-21 19:15:09,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9ee382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:09, skipping insertion in model container [2020-07-21 19:15:09,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:09" (2/3) ... [2020-07-21 19:15:09,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9ee382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:09, skipping insertion in model container [2020-07-21 19:15:09,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:09" (3/3) ... [2020-07-21 19:15:09,613 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1012b.c [2020-07-21 19:15:09,624 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:15:09,632 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:15:09,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:15:09,666 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:15:09,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:15:09,666 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:15:09,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:15:09,667 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:15:09,667 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:15:09,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:15:09,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:15:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-21 19:15:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 19:15:09,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:09,691 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] [2020-07-21 19:15:09,691 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1978899259, now seen corresponding path program 1 times [2020-07-21 19:15:09,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:09,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284047968] [2020-07-21 19:15:09,704 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 19:15:09,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 19:15:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:09,840 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 19:15:09,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:15:09,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284047968] [2020-07-21 19:15:09,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:15:09,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 19:15:09,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878976925] [2020-07-21 19:15:09,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 19:15:09,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 19:15:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 19:15:09,866 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-07-21 19:15:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:09,889 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 19:15:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 19:15:09,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-21 19:15:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:09,900 INFO L225 Difference]: With dead ends: 54 [2020-07-21 19:15:09,900 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 19:15:09,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 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 19:15:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 19:15:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 19:15:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 19:15:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2020-07-21 19:15:09,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 23 [2020-07-21 19:15:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:09,945 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2020-07-21 19:15:09,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 19:15:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2020-07-21 19:15:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:15:09,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:09,947 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] [2020-07-21 19:15:10,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:10,161 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash 749195959, now seen corresponding path program 1 times [2020-07-21 19:15:10,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:10,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260744266] [2020-07-21 19:15:10,163 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 19:15:10,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 19:15:10,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 19:15:10,335 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:10,360 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 19:15:10,361 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 19:15:10,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:10,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:15:10 BoogieIcfgContainer [2020-07-21 19:15:10,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:15:10,608 INFO L168 Benchmark]: Toolchain (without parser) took 1806.03 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 102.8 MB in the beginning and 119.1 MB in the end (delta: -16.4 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,612 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.06 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,616 INFO L168 Benchmark]: Boogie Preprocessor took 138.14 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,617 INFO L168 Benchmark]: RCFGBuilder took 407.51 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 162.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,618 INFO L168 Benchmark]: TraceAbstraction took 999.71 ms. Allocated memory is still 201.9 MB. Free memory was 161.3 MB in the beginning and 119.1 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:10,625 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.06 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 91.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.14 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.8 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.51 ms. Allocated memory is still 201.9 MB. Free memory was 178.8 MB in the beginning and 162.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 999.71 ms. Allocated memory is still 201.9 MB. Free memory was 161.3 MB in the beginning and 119.1 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 51]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 46, overapproximation of bitwiseAnd at line 34. Possible FailurePath: [L46] float x = -1.0f / 0.0f; [L47] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L12] __uint32_t ix; VAL [\old(x)=0, x=0] [L14] ieee_float_shape_type gf_u; [L15] gf_u.value = (x) [L16] EXPR gf_u.word [L16] (ix) = gf_u.word [L19] ieee_float_shape_type sf_u; [L20] sf_u.word = (ix & 0x7fffffff) [L21] EXPR sf_u.value [L21] (x) = sf_u.value [L23] return x; VAL [\old(x)=0, \result=3, ix=10, x=3] [L47] RET, EXPR fabs_float(x) VAL [fabs_float(x)=3, x=0] [L47] float res = fabs_float(x); [L50] CALL, EXPR isinf_float(res) VAL [\old(x)=3] [L28] __int32_t ix; VAL [\old(x)=3, x=3] [L30] ieee_float_shape_type gf_u; [L31] gf_u.value = (x) [L32] EXPR gf_u.word [L32] (ix) = gf_u.word [L34] ix &= 0x7fffffff [L35] return ((ix) == 0x7f800000L); VAL [\old(x)=3, \result=0, ix=13, x=3] [L50] RET, EXPR isinf_float(res) VAL [isinf_float(res)=0, res=3, x=0] [L50] COND TRUE !isinf_float(res) [L51] __VERIFIER_error() VAL [res=3, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 484 SizeOfPredicates, 0 NumberOfNonLiveVariables, 75 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...