/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_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:55:45,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:55:45,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:55:45,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:55:45,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:55:45,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:55:45,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:55:45,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:55:45,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:55:45,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:55:45,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:55:45,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:55:45,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:55:45,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:55:45,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:55:45,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:55:45,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:55:45,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:55:45,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:55:45,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:55:45,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:55:45,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:55:45,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:55:45,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:55:45,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:55:45,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:55:45,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:55:45,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:55:45,296 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 [2020-10-23 17:55:45,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:55:45,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:55:45,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:55:45,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:55:45,361 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:55:45,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:55:45,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:55:45,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:55:45,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:55:45,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:55:45,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:55:45,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:55:45,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:55:45,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:55:45,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:55:45,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:55:45,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:55:45,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:55:45,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:55:45,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:55:45,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:55:45,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:55:45,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:55:45,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:55:45,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:55:45,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:55:45,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:55:45,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:55:45,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:55:45,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:55:45,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:55:45,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:55:45,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:55:45,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:55:45,830 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:55:45,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-10-23 17:55:45,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e39f5d3/b0fd6e60170b4f23bd6a2330c196f524/FLAG4be71b047 [2020-10-23 17:55:46,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:55:46,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-10-23 17:55:46,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e39f5d3/b0fd6e60170b4f23bd6a2330c196f524/FLAG4be71b047 [2020-10-23 17:55:46,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e39f5d3/b0fd6e60170b4f23bd6a2330c196f524 [2020-10-23 17:55:46,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:55:46,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:55:46,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:46,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:55:46,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:55:46,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:46" (1/1) ... [2020-10-23 17:55:46,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407f7f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:46, skipping insertion in model container [2020-10-23 17:55:46,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:46" (1/1) ... [2020-10-23 17:55:46,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:55:46,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:55:47,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:47,162 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:55:47,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:47,204 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:55:47,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47 WrapperNode [2020-10-23 17:55:47,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:47,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:55:47,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:55:47,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:55:47,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (1/1) ... [2020-10-23 17:55:47,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:55:47,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:55:47,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:55:47,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:55:47,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (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 [2020-10-23 17:55:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:55:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:55:47,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:55:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-10-23 17:55:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 17:55:47,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:55:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:55:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:55:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:55:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:55:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:55:47,679 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:55:47,679 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-23 17:55:47,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:47 BoogieIcfgContainer [2020-10-23 17:55:47,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:55:47,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:55:47,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:55:47,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:55:47,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:55:46" (1/3) ... [2020-10-23 17:55:47,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b23f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:47, skipping insertion in model container [2020-10-23 17:55:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:47" (2/3) ... [2020-10-23 17:55:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b23f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:47, skipping insertion in model container [2020-10-23 17:55:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:47" (3/3) ... [2020-10-23 17:55:47,690 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2020-10-23 17:55:47,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:55:47,708 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:55:47,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:55:47,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:55:47,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:55:47,787 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:55:47,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:55:47,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:55:47,787 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:55:47,788 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:55:47,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:55:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 17:55:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 17:55:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:47,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:55:47,828 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash 609677879, now seen corresponding path program 1 times [2020-10-23 17:55:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102588149] [2020-10-23 17:55:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:48,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:55:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:48,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:55:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:55:48,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102588149] [2020-10-23 17:55:48,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:55:48,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:55:48,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421390653] [2020-10-23 17:55:48,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:55:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:55:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:55:48,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:55:48,374 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-23 17:55:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:55:48,583 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-23 17:55:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 17:55:48,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-23 17:55:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:55:48,594 INFO L225 Difference]: With dead ends: 61 [2020-10-23 17:55:48,594 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 17:55:48,600 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 [2020-10-23 17:55:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 17:55:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 17:55:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 17:55:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-23 17:55:48,641 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 18 [2020-10-23 17:55:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:55:48,641 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-23 17:55:48,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:55:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-23 17:55:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 17:55:48,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:48,643 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] [2020-10-23 17:55:48,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:55:48,643 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1142720300, now seen corresponding path program 1 times [2020-10-23 17:55:48,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:48,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14618611] [2020-10-23 17:55:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:48,692 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:48,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:48,751 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:55:48,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:55:48,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:55:48,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:55:48 BoogieIcfgContainer [2020-10-23 17:55:48,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:55:48,790 INFO L168 Benchmark]: Toolchain (without parser) took 1846.58 ms. Allocated memory is still 152.0 MB. Free memory was 127.7 MB in the beginning and 86.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 41.7 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:48,791 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:55:48,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.88 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 117.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:48,794 INFO L168 Benchmark]: Boogie Preprocessor took 43.96 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:48,795 INFO L168 Benchmark]: RCFGBuilder took 430.11 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 130.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:48,797 INFO L168 Benchmark]: TraceAbstraction took 1103.06 ms. Allocated memory is still 152.0 MB. Free memory was 130.4 MB in the beginning and 86.3 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:48,809 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 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.88 ms. Allocated memory is still 152.0 MB. Free memory was 127.1 MB in the beginning and 117.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.96 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 430.11 ms. Allocated memory is still 152.0 MB. Free memory was 115.5 MB in the beginning and 130.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1103.06 ms. Allocated memory is still 152.0 MB. Free memory was 130.4 MB in the beginning and 86.3 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 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 51, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = 0.0f; VAL [x=0] [L48] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; VAL [\old(x)=0, \result=60, ix=61, x=60] [L48] RET, EXPR fabs_float(x) VAL [fabs_float(x)=60, x=0] [L48] float res = fabs_float(x); [L51] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=60, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L52] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1011a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 8 SDslu, 23 SDs, 0 SdLazy, 28 SolverSat, 8 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=36occurred 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, 38 NumberOfCodeBlocks, 38 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...