/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_1250.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 21:58:12,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:58:12,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:58:13,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:58:13,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:58:13,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:58:13,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:58:13,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:58:13,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:58:13,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:58:13,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:58:13,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:58:13,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:58:13,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:58:13,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:58:13,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:58:13,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:58:13,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:58:13,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:58:13,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:58:13,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:58:13,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:58:13,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:58:13,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:58:13,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 21:58:13,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:58:13,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:58:13,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:58:13,083 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 [2020-11-06 21:58:13,111 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:58:13,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:58:13,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:58:13,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:58:13,113 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:58:13,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:58:13,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:58:13,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:58:13,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:58:13,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:58:13,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:58:13,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:58:13,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:58:13,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:58:13,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:58:13,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:58:13,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:58:13,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:58:13,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:58:13,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:58:13,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:58:13,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:58:13,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:58:13,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:58:13,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:58:13,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:58:13,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:58:13,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:58:13,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:58:13,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:58:13,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:58:13,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:58:13,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:58:13,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:58:13,623 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:58:13,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2020-11-06 21:58:13,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fda33849/78fc76d7929049a9a06bfce2c1aa2c03/FLAGb86c6b40f [2020-11-06 21:58:14,427 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:58:14,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1250.c [2020-11-06 21:58:14,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fda33849/78fc76d7929049a9a06bfce2c1aa2c03/FLAGb86c6b40f [2020-11-06 21:58:14,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fda33849/78fc76d7929049a9a06bfce2c1aa2c03 [2020-11-06 21:58:14,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:58:14,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:58:14,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:14,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:58:14,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:58:14,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:14" (1/1) ... [2020-11-06 21:58:14,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614eea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:14, skipping insertion in model container [2020-11-06 21:58:14,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:14" (1/1) ... [2020-11-06 21:58:14,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:58:14,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:58:14,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:14,994 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:58:15,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:58:15,041 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:58:15,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15 WrapperNode [2020-11-06 21:58:15,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:58:15,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:58:15,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:58:15,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:58:15,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2020-11-06 21:58:15,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:58:15,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:58:15,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:58:15,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:58:15,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (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 [2020-11-06 21:58:15,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:58:15,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:58:15,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:58:15,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-11-06 21:58:15,173 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-11-06 21:58:15,174 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-11-06 21:58:15,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:58:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:58:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:58:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:58:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:58:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-11-06 21:58:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-06 21:58:15,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:58:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:58:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-11-06 21:58:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-11-06 21:58:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:58:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:58:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:58:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:58:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-06 21:58:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:58:15,624 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:58:15,624 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 21:58:15,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:15 BoogieIcfgContainer [2020-11-06 21:58:15,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:58:15,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:58:15,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:58:15,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:58:15,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:14" (1/3) ... [2020-11-06 21:58:15,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d645e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:15, skipping insertion in model container [2020-11-06 21:58:15,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (2/3) ... [2020-11-06 21:58:15,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d645e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:15, skipping insertion in model container [2020-11-06 21:58:15,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:15" (3/3) ... [2020-11-06 21:58:15,650 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2020-11-06 21:58:15,669 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:58:15,673 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:58:15,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:58:15,733 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:58:15,734 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:58:15,734 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:58:15,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:58:15,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:58:15,735 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:58:15,735 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:58:15,735 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:58:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-06 21:58:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 21:58:15,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:15,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:15,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash -836905228, now seen corresponding path program 1 times [2020-11-06 21:58:15,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:15,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059105714] [2020-11-06 21:58:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,209 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-06 21:58:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 21:58:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-11-06 21:58:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:58:16,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059105714] [2020-11-06 21:58:16,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:16,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 21:58:16,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828012689] [2020-11-06 21:58:16,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 21:58:16,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 21:58:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 21:58:16,335 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-06 21:58:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:16,700 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-11-06 21:58:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 21:58:16,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 21:58:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:16,712 INFO L225 Difference]: With dead ends: 76 [2020-11-06 21:58:16,713 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 21:58:16,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 21:58:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 21:58:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-06 21:58:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-06 21:58:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-11-06 21:58:16,767 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 27 [2020-11-06 21:58:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:16,768 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-11-06 21:58:16,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 21:58:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-11-06 21:58:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 21:58:16,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:16,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:16,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:58:16,771 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 578350557, now seen corresponding path program 1 times [2020-11-06 21:58:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:16,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548333555] [2020-11-06 21:58:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:58:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:58:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-11-06 21:58:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:16,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-06 21:58:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:58:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:58:17,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548333555] [2020-11-06 21:58:17,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:58:17,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 21:58:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995902951] [2020-11-06 21:58:17,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 21:58:17,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:58:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 21:58:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 21:58:17,010 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 6 states. [2020-11-06 21:58:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:58:17,197 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-06 21:58:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 21:58:17,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-06 21:58:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:58:17,201 INFO L225 Difference]: With dead ends: 53 [2020-11-06 21:58:17,201 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 21:58:17,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-06 21:58:17,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 21:58:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 21:58:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 21:58:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-11-06 21:58:17,218 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 28 [2020-11-06 21:58:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:58:17,218 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-11-06 21:58:17,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 21:58:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-11-06 21:58:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 21:58:17,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:58:17,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:58:17,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 21:58:17,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:58:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:58:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash 266554572, now seen corresponding path program 1 times [2020-11-06 21:58:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:58:17,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353296098] [2020-11-06 21:58:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:58:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:17,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:58:17,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:58:17,377 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 21:58:17,377 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 21:58:17,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 21:58:17,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:58:17 BoogieIcfgContainer [2020-11-06 21:58:17,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 21:58:17,419 INFO L168 Benchmark]: Toolchain (without parser) took 2645.05 ms. Allocated memory is still 161.5 MB. Free memory was 136.5 MB in the beginning and 53.2 MB in the end (delta: 83.3 MB). Peak memory consumption was 84.2 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:17,420 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:58:17,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.30 ms. Allocated memory is still 161.5 MB. Free memory was 135.9 MB in the beginning and 125.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:17,422 INFO L168 Benchmark]: Boogie Preprocessor took 44.67 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:17,423 INFO L168 Benchmark]: RCFGBuilder took 537.95 ms. Allocated memory is still 161.5 MB. Free memory was 124.1 MB in the beginning and 106.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:17,424 INFO L168 Benchmark]: TraceAbstraction took 1789.36 ms. Allocated memory is still 161.5 MB. Free memory was 106.2 MB in the beginning and 53.2 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. [2020-11-06 21:58:17,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 259.30 ms. Allocated memory is still 161.5 MB. Free memory was 135.9 MB in the beginning and 125.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.67 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 537.95 ms. Allocated memory is still 161.5 MB. Free memory was 124.1 MB in the beginning and 106.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1789.36 ms. Allocated memory is still 161.5 MB. Free memory was 106.2 MB in the beginning and 53.2 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L64] CALL, EXPR fmax_float(x, y) VAL [\old(x)=2139095046, \old(y)=2139095042] [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095046] [L22] __uint32_t w; VAL [\old(x)=2139095046, x=2139095046] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=2139095046, w=2139095041, x=2139095046] [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=2139095046, w=2139095041, x=2139095046] [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=2139095046, w=2139095041, x=2139095046] [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; VAL [\old(x)=2139095046, \result=0, w=2139095041, x=2139095046] [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095046, \old(y)=2139095042, __fpclassify_float(x)=0, x=2139095046, y=2139095042] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=2139095046, \old(y)=2139095042, \result=2139095042, x=2139095046, y=2139095042] [L64] RET, EXPR fmax_float(x, y) VAL [fmax_float(x, y)=2139095042, x=2139095046, y=2139095042] [L64] float res = fmax_float(x, y); [L66] CALL, EXPR isnan_float(res) VAL [\old(x)=2139095042] [L56] return x != x; VAL [\old(x)=2139095042, \result=0, x=2139095042] [L66] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=2139095042, x=2139095046, y=2139095042] [L66] COND TRUE !isnan_float(res) [L67] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1250.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 24 SDslu, 122 SDs, 0 SdLazy, 101 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 4483 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...