/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_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:13:33,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:13:33,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:13:33,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:13:33,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:13:33,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:13:33,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:13:33,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:13:33,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:13:33,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:13:33,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:13:33,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:13:33,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:13:33,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:13:33,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:13:33,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:13:33,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:13:33,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:13:33,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:13:33,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:13:33,330 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 [2021-02-23 13:13:33,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:13:33,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:13:33,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:13:33,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:13:33,396 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:13:33,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:13:33,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:13:33,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:13:33,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:13:33,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:13:33,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:13:33,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:13:33,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:13:33,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:13:33,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:13:33,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:13:33,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:13:33,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:13:33,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:13:33,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:13:33,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:13:33,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:13:33,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:13:33,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:13:33,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:13:33,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:13:33,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:13:33,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:13:33,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:13:33,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:13:33,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:13:33,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:13:33,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:13:33,924 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:13:33,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-23 13:13:34,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0335f7ac5/bf430aaa4c6547409a92e7f007d9e57b/FLAGc72a5bb99 [2021-02-23 13:13:34,713 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:13:34,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-23 13:13:34,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0335f7ac5/bf430aaa4c6547409a92e7f007d9e57b/FLAGc72a5bb99 [2021-02-23 13:13:35,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0335f7ac5/bf430aaa4c6547409a92e7f007d9e57b [2021-02-23 13:13:35,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:13:35,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:13:35,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:35,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:13:35,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:13:35,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15acbd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35, skipping insertion in model container [2021-02-23 13:13:35,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:13:35,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:13:35,304 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_1381.c[1242,1255] [2021-02-23 13:13:35,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:35,323 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:13:35,370 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_1381.c[1242,1255] [2021-02-23 13:13:35,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:35,396 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:13:35,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35 WrapperNode [2021-02-23 13:13:35,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:35,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:13:35,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:13:35,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:13:35,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (1/1) ... [2021-02-23 13:13:35,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:13:35,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:13:35,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:13:35,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:13:35,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (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 [2021-02-23 13:13:35,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:13:35,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:13:35,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:13:35,621 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2021-02-23 13:13:35,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 13:13:35,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:13:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:13:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:13:35,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:13:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:13:35,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 13:13:35,624 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2021-02-23 13:13:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 13:13:35,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:13:35,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:13:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:13:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 13:13:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 13:13:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:13:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:13:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:13:35,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:13:36,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:13:36,141 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 13:13:36,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:36 BoogieIcfgContainer [2021-02-23 13:13:36,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:13:36,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:13:36,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:13:36,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:13:36,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:13:35" (1/3) ... [2021-02-23 13:13:36,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6e558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:36, skipping insertion in model container [2021-02-23 13:13:36,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:35" (2/3) ... [2021-02-23 13:13:36,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6e558d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:36, skipping insertion in model container [2021-02-23 13:13:36,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:36" (3/3) ... [2021-02-23 13:13:36,153 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2021-02-23 13:13:36,160 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:13:36,165 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:13:36,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:13:36,218 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:13:36,218 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:13:36,218 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:13:36,218 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:13:36,218 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:13:36,219 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:13:36,219 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:13:36,219 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:13:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-23 13:13:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:13:36,244 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:36,245 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] [2021-02-23 13:13:36,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1761830517, now seen corresponding path program 1 times [2021-02-23 13:13:36,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:36,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653929731] [2021-02-23 13:13:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 13:13:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:13:36,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653929731] [2021-02-23 13:13:36,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:36,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:13:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247176164] [2021-02-23 13:13:36,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:13:36,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:13:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:13:36,648 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-23 13:13:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:36,906 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-02-23 13:13:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:13:36,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:13:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:36,921 INFO L225 Difference]: With dead ends: 52 [2021-02-23 13:13:36,922 INFO L226 Difference]: Without dead ends: 26 [2021-02-23 13:13:36,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:13:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-23 13:13:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-02-23 13:13:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-23 13:13:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2021-02-23 13:13:36,990 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 22 [2021-02-23 13:13:36,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:36,991 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2021-02-23 13:13:36,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:13:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2021-02-23 13:13:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:13:36,993 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:36,993 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] [2021-02-23 13:13:36,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:13:36,994 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 446444161, now seen corresponding path program 1 times [2021-02-23 13:13:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:36,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824610859] [2021-02-23 13:13:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:37,104 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:37,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:37,174 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:13:37,174 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:13:37,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:13:37,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:13:37 BoogieIcfgContainer [2021-02-23 13:13:37,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:13:37,223 INFO L168 Benchmark]: Toolchain (without parser) took 2155.34 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 83.4 MB in the end (delta: 43.4 MB). Peak memory consumption was 42.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:37,224 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:37,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:37,225 INFO L168 Benchmark]: Boogie Preprocessor took 87.50 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:37,226 INFO L168 Benchmark]: RCFGBuilder took 653.71 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 130.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:37,227 INFO L168 Benchmark]: TraceAbstraction took 1076.12 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 83.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:37,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 313.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.50 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 653.71 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 130.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1076.12 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 83.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 51]: 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 35, overapproximation of bitwiseOr at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L45] float x = 0.0f / 0.0f; [L46] float y = __VERIFIER_nondet_float(); [L47] CALL, EXPR copysign_float(x, y) VAL [\old(x)=60, \old(y)=59] [L15] __uint32_t ix, iy; VAL [\old(x)=60, \old(y)=59, x=60, y=59] [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 gf_u; [L23] gf_u.value = (y) [L24] EXPR gf_u.word [L24] (iy) = gf_u.word [L27] ieee_float_shape_type sf_u; [L28] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) [L29] EXPR sf_u.value [L29] (x) = sf_u.value [L31] return x; VAL [\old(x)=60, \old(y)=59, \result=50, ix=62, iy=57, x=50, y=59] [L47] RET, EXPR copysign_float(x, y) VAL [copysign_float(x, y)=50, x=60, y=59] [L47] float res = copysign_float(x, y); [L50] CALL, EXPR isnan_float(res) VAL [\old(x)=50] [L35] return x != x; VAL [\old(x)=50, \result=0, x=50] [L50] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=50, x=60, y=59] [L50] COND TRUE !isnan_float(res) [L51] reach_error() VAL [res=50, x=60, y=59] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 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: 27 SDtfs, 8 SDslu, 18 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1323 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...