/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 15:47:48,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:47:48,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:47:48,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 15:47:48,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 15:47:48,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 15:47:48,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 15:47:48,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 15:47:48,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 15:47:48,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 15:47:48,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 15:47:48,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 15:47:48,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:47:48,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:47:48,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:47:48,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:47:48,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:47:48,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:47:48,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:47:48,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:47:48,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:47:48,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:47:48,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:47:48,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:47:48,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:47:48,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:47:48,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:47:48,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:47:48,721 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 [2021-02-21 15:47:48,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:47:48,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:47:48,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:47:48,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:47:48,782 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:47:48,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:47:48,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:47:48,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:47:48,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:47:48,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:47:48,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:47:48,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:47:48,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:47:48,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:47:48,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:47:48,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:47:48,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:47:48,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:47:48,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:47:48,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:47:48,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:47:48,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:47:48,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:47:48,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:47:48,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:47:48,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:47:48,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:47:48,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:47:48,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:47:49,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:47:49,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:47:49,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:47:49,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:47:49,230 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:47:49,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2021-02-21 15:47:49,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18b9f26f/1dd25057559f4f3f8e230e9f7f95aec2/FLAG6efdda32d [2021-02-21 15:47:49,899 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:47:49,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2021-02-21 15:47:49,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18b9f26f/1dd25057559f4f3f8e230e9f7f95aec2/FLAG6efdda32d [2021-02-21 15:47:50,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18b9f26f/1dd25057559f4f3f8e230e9f7f95aec2 [2021-02-21 15:47:50,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:47:50,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:47:50,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:47:50,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:47:50,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:47:50,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd8a497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50, skipping insertion in model container [2021-02-21 15:47:50,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:47:50,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:47:50,610 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c[1571,1584] [2021-02-21 15:47:50,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:47:50,622 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:47:50,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c[1571,1584] [2021-02-21 15:47:50,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:47:50,663 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:47:50,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50 WrapperNode [2021-02-21 15:47:50,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:47:50,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:47:50,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:47:50,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:47:50,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:47:50,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:47:50,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:47:50,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:47:50,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (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 [2021-02-21 15:47:50,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:47:50,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:47:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:47:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2021-02-21 15:47:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 15:47:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:47:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:47:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:47:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:47:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:47:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2021-02-21 15:47:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 15:47:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:47:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:47:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:47:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:47:51,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:47:51,338 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-21 15:47:51,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:47:51 BoogieIcfgContainer [2021-02-21 15:47:51,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:47:51,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:47:51,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:47:51,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:47:51,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:47:50" (1/3) ... [2021-02-21 15:47:51,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3443e873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:47:51, skipping insertion in model container [2021-02-21 15:47:51,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:50" (2/3) ... [2021-02-21 15:47:51,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3443e873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:47:51, skipping insertion in model container [2021-02-21 15:47:51,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:47:51" (3/3) ... [2021-02-21 15:47:51,350 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072c.c [2021-02-21 15:47:51,357 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:47:51,363 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:47:51,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:47:51,416 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:47:51,417 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:47:51,417 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:47:51,417 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:47:51,417 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:47:51,417 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:47:51,418 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:47:51,418 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:47:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-21 15:47:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 15:47:51,443 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:47:51,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:47:51,445 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:47:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:47:51,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1204990026, now seen corresponding path program 1 times [2021-02-21 15:47:51,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:47:51,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020956156] [2021-02-21 15:47:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:47:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:51,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:51,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:51,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:51,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:51,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:47:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:51,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:51,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:51,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 15:47:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:51,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:51,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:51,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:51,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:47:51,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020956156] [2021-02-21 15:47:51,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:47:51,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 15:47:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708078841] [2021-02-21 15:47:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 15:47:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:47:51,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 15:47:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 15:47:51,850 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2021-02-21 15:47:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:47:52,012 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-02-21 15:47:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 15:47:52,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 15:47:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:47:52,022 INFO L225 Difference]: With dead ends: 68 [2021-02-21 15:47:52,022 INFO L226 Difference]: Without dead ends: 34 [2021-02-21 15:47:52,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 15:47:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-21 15:47:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-21 15:47:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-21 15:47:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-02-21 15:47:52,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-02-21 15:47:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:47:52,073 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-02-21 15:47:52,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 15:47:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-02-21 15:47:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 15:47:52,075 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:47:52,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:47:52,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:47:52,075 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:47:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:47:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1585172858, now seen corresponding path program 1 times [2021-02-21 15:47:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:47:52,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162146064] [2021-02-21 15:47:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:47:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:47:52,220 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:47:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:47:52,308 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:47:52,358 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:47:52,358 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:47:52,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:47:52,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:47:52 BoogieIcfgContainer [2021-02-21 15:47:52,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:47:52,422 INFO L168 Benchmark]: Toolchain (without parser) took 2116.05 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 117.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:52,423 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:47:52,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 114.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:52,425 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:52,426 INFO L168 Benchmark]: RCFGBuilder took 631.70 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 123.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:52,427 INFO L168 Benchmark]: TraceAbstraction took 1078.00 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 117.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:52,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 114.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 631.70 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 123.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1078.00 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 117.0 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 69]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 68, overapproximation of bitwiseAnd at line 21, overapproximation of someBinaryArithmeticFLOAToperation at line 40. Possible FailurePath: [L64] float x = 0.0f; VAL [x=0] [L65] CALL, EXPR trunc_float(x) VAL [\old(x)=0] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L21] signbit = w & 0x80000000 [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L39] COND TRUE exponent_less_127 == 255 [L40] return x + x; VAL [\old(x)=0, exponent_less_127=255, signbit=-1, w=-2, x=0] [L65] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967300, x=0] [L65] float res = trunc_float(x); [L68] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=4294967300, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L68] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L69] reach_error() VAL [res=4294967300, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 6 SDslu, 32 SDs, 0 SdLazy, 39 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 1003 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...