/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_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 15:47:49,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:47:49,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:47:49,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 15:47:49,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:47:49,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:47:49,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:47:49,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:47:49,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:47:49,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:47:49,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:47:49,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:47:49,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:47:49,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:47:49,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:47:49,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:47:49,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:47:49,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:47:49,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:47:49,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:47:49,217 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 15:47:49,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:47:49,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:47:49,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:47:49,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:47:49,246 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:47:49,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:47:49,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:47:49,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:47:49,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:47:49,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:47:49,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:47:49,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:47:49,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:47:49,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:47:49,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:47:49,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:47:49,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:47:49,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:47:49,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:47:49,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:47:49,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:47:49,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:47:49,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:47:49,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:47:49,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:47:49,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:47:49,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:47:49,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:47:49,744 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:47:49,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2021-02-21 15:47:49,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f7b083f/65ebf166fe6e4cd990b6258055776835/FLAGf909357bf [2021-02-21 15:47:50,392 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:47:50,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2021-02-21 15:47:50,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f7b083f/65ebf166fe6e4cd990b6258055776835/FLAGf909357bf [2021-02-21 15:47:50,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f7b083f/65ebf166fe6e4cd990b6258055776835 [2021-02-21 15:47:50,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:47:50,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:47:50,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:47:50,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:47:50,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:47:50,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8b1fad 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 15:47:50,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:47:50" (1/1) ... [2021-02-21 15:47:50,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:47:50,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:47:50,974 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_1072d.c[1573,1586] [2021-02-21 15:47:50,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:47:50,989 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:47:51,017 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_1072d.c[1573,1586] [2021-02-21 15:47:51,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:47:51,037 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:47:51,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51 WrapperNode [2021-02-21 15:47:51,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:47:51,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:47:51,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:47:51,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:47:51,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (1/1) ... [2021-02-21 15:47:51,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:47:51,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:47:51,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:47:51,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:47:51,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (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 15:47:51,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:47:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:47:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:47:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2021-02-21 15:47:51,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 15:47:51,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:47:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:47:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:47:51,214 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:47:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:47:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2021-02-21 15:47:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 15:47:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:47:51,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:47:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:47:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 15:47:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 15:47:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:47:51,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:47:51,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:47:51,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:47:51,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:47:51,812 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-21 15:47:51,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:47:51 BoogieIcfgContainer [2021-02-21 15:47:51,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:47:51,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:47:51,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:47:51,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:47:51,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:47:50" (1/3) ... [2021-02-21 15:47:51,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c01bb4c 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 15:47:51,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:47:51" (2/3) ... [2021-02-21 15:47:51,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c01bb4c 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 15:47:51,829 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 15:47:51,831 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2021-02-21 15:47:51,843 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:47:51,849 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:47:51,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:47:51,923 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:47:51,923 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:47:51,924 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:47:51,924 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:47:51,924 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:47:51,924 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:47:51,924 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:47:51,925 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:47:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-21 15:47:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 15:47:51,958 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:47:51,960 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 15:47:51,961 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:47:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:47:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1204990026, now seen corresponding path program 1 times [2021-02-21 15:47:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:47:51,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242353195] [2021-02-21 15:47:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:47:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:52,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:52,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:52,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:52,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:52,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:47:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:52,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:52,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 15:47:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:47:52,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:52,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:52,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:47:52,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:47:52,414 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 15:47:52,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242353195] [2021-02-21 15:47:52,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:47:52,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 15:47:52,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505693806] [2021-02-21 15:47:52,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 15:47:52,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:47:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 15:47:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 15:47:52,445 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2021-02-21 15:47:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:47:52,728 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-02-21 15:47:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 15:47:52,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 15:47:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:47:52,741 INFO L225 Difference]: With dead ends: 68 [2021-02-21 15:47:52,741 INFO L226 Difference]: Without dead ends: 34 [2021-02-21 15:47:52,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 15:47:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-21 15:47:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-21 15:47:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-21 15:47:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-02-21 15:47:52,795 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-02-21 15:47:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:47:52,796 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-02-21 15:47:52,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 15:47:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-02-21 15:47:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 15:47:52,797 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:47:52,798 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 15:47:52,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:47:52,798 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:47:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:47:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1585172858, now seen corresponding path program 1 times [2021-02-21 15:47:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:47:52,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648152052] [2021-02-21 15:47:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:47:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:47:52,867 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:47:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:47:52,920 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:47:52,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:47:52,977 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:47:52,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:47:53,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:47:53 BoogieIcfgContainer [2021-02-21 15:47:53,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:47:53,038 INFO L168 Benchmark]: Toolchain (without parser) took 2283.32 ms. Allocated memory is still 162.5 MB. Free memory was 137.6 MB in the beginning and 92.2 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:53,040 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 162.5 MB. Free memory was 135.0 MB in the beginning and 134.9 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:47:53,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 162.5 MB. Free memory was 136.4 MB in the beginning and 126.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:53,043 INFO L168 Benchmark]: Boogie Preprocessor took 53.45 ms. Allocated memory is still 162.5 MB. Free memory was 126.2 MB in the beginning and 124.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:53,044 INFO L168 Benchmark]: RCFGBuilder took 721.94 ms. Allocated memory is still 162.5 MB. Free memory was 124.4 MB in the beginning and 141.0 MB in the end (delta: -16.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:53,045 INFO L168 Benchmark]: TraceAbstraction took 1214.23 ms. Allocated memory is still 162.5 MB. Free memory was 141.0 MB in the beginning and 92.2 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2021-02-21 15:47:53,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 162.5 MB. Free memory was 135.0 MB in the beginning and 134.9 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 162.5 MB. Free memory was 136.4 MB in the beginning and 126.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.45 ms. Allocated memory is still 162.5 MB. Free memory was 126.2 MB in the beginning and 124.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 721.94 ms. Allocated memory is still 162.5 MB. Free memory was 124.4 MB in the beginning and 141.0 MB in the end (delta: -16.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1214.23 ms. Allocated memory is still 162.5 MB. Free memory was 141.0 MB in the beginning and 92.2 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.3 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 someUnaryFLOAToperation at line 64, overapproximation of someBinaryArithmeticFLOAToperation at line 40. Possible FailurePath: [L64] float x = -0.0f; [L65] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967301] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967301, x=4294967301] [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)=4294967301, exponent_less_127=255, signbit=-1, w=-2, x=4294967301] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967301, exponent_less_127=255, signbit=-1, w=-2, x=4294967301] [L39] COND TRUE exponent_less_127 == 255 [L40] return x + x; VAL [\old(x)=4294967301, exponent_less_127=255, signbit=-1, w=-2, x=4294967301] [L65] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967300, x=4294967301] [L65] float res = trunc_float(x); [L68] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=4294967300, res == -0.0f && __signbit_float(res) == 1=0, x=4294967301] [L68] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L69] reach_error() VAL [res=4294967300, x=4294967301] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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...