/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-b7b32d2 [2021-02-21 15:48:06,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:48:06,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:48:06,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 15:48:06,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:48:06,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:48:06,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:48:06,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:48:06,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:48:06,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:48:06,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:48:06,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:48:06,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:48:06,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:48:06,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:48:06,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:48:06,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:48:06,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:48:06,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:48:06,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:48:06,181 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 15:48:06,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:48:06,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:48:06,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:48:06,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:48:06,235 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:48:06,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:48:06,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:48:06,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:48:06,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:48:06,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:48:06,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:48:06,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:48:06,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:48:06,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:48:06,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:48:06,240 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:48:06,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:48:06,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:48:06,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:48:06,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:48:06,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:48:06,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:48:06,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:48:06,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:48:06,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:48:06,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:48:06,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:48:06,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:48:06,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:48:06,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:48:06,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:48:06,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:48:06,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:48:06,727 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:48:06,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-21 15:48:06,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a6579b5/b23f74610b134421ae2d5edd48c8b295/FLAG6374bddbc [2021-02-21 15:48:07,386 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:48:07,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-21 15:48:07,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a6579b5/b23f74610b134421ae2d5edd48c8b295/FLAG6374bddbc [2021-02-21 15:48:07,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a6579b5/b23f74610b134421ae2d5edd48c8b295 [2021-02-21 15:48:07,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:48:07,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:48:07,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:07,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:48:07,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:48:07,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:07" (1/1) ... [2021-02-21 15:48:07,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fb62bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:07, skipping insertion in model container [2021-02-21 15:48:07,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:07" (1/1) ... [2021-02-21 15:48:07,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:48:07,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:48:08,021 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] [2021-02-21 15:48:08,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:08,044 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:48:08,080 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] [2021-02-21 15:48:08,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:08,103 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:48:08,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08 WrapperNode [2021-02-21 15:48:08,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:08,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:48:08,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:48:08,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:48:08,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (1/1) ... [2021-02-21 15:48:08,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:48:08,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:48:08,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:48:08,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:48:08,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (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 15:48:08,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:48:08,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:48:08,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:48:08,280 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2021-02-21 15:48:08,281 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-21 15:48:08,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:48:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:48:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:48:08,281 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:48:08,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:48:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:48:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 15:48:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-21 15:48:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:48:08,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:48:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:48:08,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:48:08,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:48:08,784 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-21 15:48:08,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:08 BoogieIcfgContainer [2021-02-21 15:48:08,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:48:08,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:48:08,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:48:08,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:48:08,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:48:07" (1/3) ... [2021-02-21 15:48:08,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17d239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:08, skipping insertion in model container [2021-02-21 15:48:08,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:08" (2/3) ... [2021-02-21 15:48:08,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17d239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:08, skipping insertion in model container [2021-02-21 15:48:08,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:08" (3/3) ... [2021-02-21 15:48:08,813 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2021-02-21 15:48:08,820 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:48:08,825 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:48:08,844 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:48:08,871 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:48:08,871 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:48:08,871 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:48:08,872 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:48:08,872 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:48:08,872 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:48:08,872 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:48:08,872 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:48:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-21 15:48:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 15:48:08,895 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:08,896 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] [2021-02-21 15:48:08,897 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1761830517, now seen corresponding path program 1 times [2021-02-21 15:48:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404576150] [2021-02-21 15:48:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:48:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 15:48:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 15:48:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:09,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:09,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:09,248 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 15:48:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404576150] [2021-02-21 15:48:09,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:48:09,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 15:48:09,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950003743] [2021-02-21 15:48:09,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 15:48:09,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:48:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 15:48:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 15:48:09,272 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-21 15:48:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:48:09,494 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-02-21 15:48:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 15:48:09,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 15:48:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:48:09,505 INFO L225 Difference]: With dead ends: 52 [2021-02-21 15:48:09,506 INFO L226 Difference]: Without dead ends: 26 [2021-02-21 15:48:09,509 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 [2021-02-21 15:48:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-21 15:48:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-02-21 15:48:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-21 15:48:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2021-02-21 15:48:09,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 22 [2021-02-21 15:48:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:48:09,550 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2021-02-21 15:48:09,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 15:48:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2021-02-21 15:48:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 15:48:09,552 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:09,552 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] [2021-02-21 15:48:09,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:48:09,553 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash 446444161, now seen corresponding path program 1 times [2021-02-21 15:48:09,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:09,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743487605] [2021-02-21 15:48:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:09,603 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:09,637 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:09,673 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:48:09,673 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:48:09,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:48:09,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:48:09 BoogieIcfgContainer [2021-02-21 15:48:09,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:48:09,725 INFO L168 Benchmark]: Toolchain (without parser) took 1966.79 ms. Allocated memory is still 163.6 MB. Free memory was 139.0 MB in the beginning and 98.4 MB in the end (delta: 40.7 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,726 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:48:09,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.40 ms. Allocated memory is still 163.6 MB. Free memory was 137.9 MB in the beginning and 128.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,728 INFO L168 Benchmark]: Boogie Preprocessor took 68.95 ms. Allocated memory is still 163.6 MB. Free memory was 128.0 MB in the beginning and 126.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,729 INFO L168 Benchmark]: RCFGBuilder took 610.13 ms. Allocated memory is still 163.6 MB. Free memory was 126.2 MB in the beginning and 145.6 MB in the end (delta: -19.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,730 INFO L168 Benchmark]: TraceAbstraction took 925.07 ms. Allocated memory is still 163.6 MB. Free memory was 145.0 MB in the beginning and 98.4 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:09,733 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.40 ms. Allocated memory is still 163.6 MB. Free memory was 137.9 MB in the beginning and 128.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.95 ms. Allocated memory is still 163.6 MB. Free memory was 128.0 MB in the beginning and 126.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.13 ms. Allocated memory is still 163.6 MB. Free memory was 126.2 MB in the beginning and 145.6 MB in the end (delta: -19.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 925.07 ms. Allocated memory is still 163.6 MB. Free memory was 145.0 MB in the beginning and 98.4 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: 0.8s, 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, 0.0s 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, 0.0s SatisfiabilityAnalysisTime, 0.1s 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...