/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_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:13:32,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:13:32,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:13:32,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:13:32,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:13:32,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:13:32,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:13:32,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:13:32,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:13:32,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:13:32,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:13:32,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:13:32,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:13:32,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:13:32,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:13:32,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:13:32,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:13:32,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:13:32,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:13:32,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:13:32,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:13:32,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:13:32,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:13:32,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:13:32,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 13:13:32,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 13:13:32,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 13:13:32,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 13:13:32,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 13:13:32,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 13:13:32,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 13:13:32,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 13:13:32,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 13:13:32,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 13:13:32,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 13:13:32,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 13:13:32,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 13:13:32,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 13:13:32,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:13:32,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:13:32,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:13:32,668 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 13:13:32,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:13:32,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:13:32,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:13:32,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:13:32,723 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:13:32,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:13:32,724 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:13:32,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:13:32,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:13:32,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:13:32,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:13:32,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:13:32,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:13:32,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:13:32,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:13:32,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:13:32,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:13:32,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:13:32,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:13:32,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:13:32,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:13:32,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:13:32,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:13:32,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:13:32,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:13:32,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:13:32,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:13:32,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:13:32,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:13:33,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:13:33,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:13:33,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:13:33,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:13:33,130 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:13:33,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2021-02-23 13:13:33,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ff4c844/889642ff89f44e7096a7f8d7a2ce2578/FLAGfd5272538 [2021-02-23 13:13:33,939 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:13:33,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2021-02-23 13:13:33,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ff4c844/889642ff89f44e7096a7f8d7a2ce2578/FLAGfd5272538 [2021-02-23 13:13:34,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ff4c844/889642ff89f44e7096a7f8d7a2ce2578 [2021-02-23 13:13:34,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:13:34,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:13:34,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:34,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:13:34,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:13:34,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0689f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34, skipping insertion in model container [2021-02-23 13:13:34,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:13:34,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:13:34,545 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_1252a.c[1897,1910] [2021-02-23 13:13:34,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:34,559 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:13:34,583 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_1252a.c[1897,1910] [2021-02-23 13:13:34,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:34,602 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:13:34,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34 WrapperNode [2021-02-23 13:13:34,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:34,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:13:34,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:13:34,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:13:34,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (1/1) ... [2021-02-23 13:13:34,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:13:34,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:13:34,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:13:34,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:13:34,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (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 13:13:34,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:13:34,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:13:34,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:13:34,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-23 13:13:34,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2021-02-23 13:13:34,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 13:13:34,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:13:34,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:13:34,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:13:34,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:13:34,775 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2021-02-23 13:13:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 13:13:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:13:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:13:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:13:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:13:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 13:13:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:13:35,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:13:35,221 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-23 13:13:35,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:35 BoogieIcfgContainer [2021-02-23 13:13:35,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:13:35,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:13:35,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:13:35,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:13:35,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:13:34" (1/3) ... [2021-02-23 13:13:35,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc02044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:35, skipping insertion in model container [2021-02-23 13:13:35,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:34" (2/3) ... [2021-02-23 13:13:35,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc02044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:35, skipping insertion in model container [2021-02-23 13:13:35,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:35" (3/3) ... [2021-02-23 13:13:35,234 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2021-02-23 13:13:35,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:13:35,247 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:13:35,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:13:35,313 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:13:35,313 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:13:35,313 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:13:35,313 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:13:35,313 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:13:35,314 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:13:35,314 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:13:35,314 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:13:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-02-23 13:13:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:13:35,369 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:35,371 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 13:13:35,371 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1701413730, now seen corresponding path program 1 times [2021-02-23 13:13:35,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:35,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690149894] [2021-02-23 13:13:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:35,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:35,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:35,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 13:13:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:35,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:35,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:35,845 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 13:13:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690149894] [2021-02-23 13:13:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:35,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:13:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116392368] [2021-02-23 13:13:35,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:13:35,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:13:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:13:35,870 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-02-23 13:13:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:36,034 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2021-02-23 13:13:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:13:36,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:13:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:36,045 INFO L225 Difference]: With dead ends: 79 [2021-02-23 13:13:36,046 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 13:13:36,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 13:13:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 13:13:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 13:13:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 13:13:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-02-23 13:13:36,095 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2021-02-23 13:13:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:36,095 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-02-23 13:13:36,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:13:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-02-23 13:13:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:13:36,098 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:36,098 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] [2021-02-23 13:13:36,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:13:36,099 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1066470796, now seen corresponding path program 1 times [2021-02-23 13:13:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:36,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589422994] [2021-02-23 13:13:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:13:36,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 13:13:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:13:36,279 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 13:13:36,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589422994] [2021-02-23 13:13:36,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:36,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:13:36,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199349672] [2021-02-23 13:13:36,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:13:36,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:13:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:13:36,285 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2021-02-23 13:13:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:36,443 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-02-23 13:13:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 13:13:36,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-02-23 13:13:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:36,447 INFO L225 Difference]: With dead ends: 59 [2021-02-23 13:13:36,448 INFO L226 Difference]: Without dead ends: 44 [2021-02-23 13:13:36,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:13:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-23 13:13:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-02-23 13:13:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 13:13:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-02-23 13:13:36,464 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 23 [2021-02-23 13:13:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:36,465 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-02-23 13:13:36,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:13:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-02-23 13:13:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:13:36,466 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:36,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:13:36,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:13:36,467 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash 666186437, now seen corresponding path program 1 times [2021-02-23 13:13:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:36,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582912869] [2021-02-23 13:13:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:13:36,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-02-23 13:13:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:36,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:36,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:36,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:13:36,649 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 13:13:36,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582912869] [2021-02-23 13:13:36,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:36,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:13:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199372872] [2021-02-23 13:13:36,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:13:36,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:36,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:13:36,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:13:36,652 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2021-02-23 13:13:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:36,798 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-02-23 13:13:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 13:13:36,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-23 13:13:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:36,801 INFO L225 Difference]: With dead ends: 63 [2021-02-23 13:13:36,801 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 13:13:36,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:13:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 13:13:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-02-23 13:13:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 13:13:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-02-23 13:13:36,814 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 26 [2021-02-23 13:13:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:36,814 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-02-23 13:13:36,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:13:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-02-23 13:13:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:13:36,816 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:36,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:13:36,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:13:36,817 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1130764922, now seen corresponding path program 1 times [2021-02-23 13:13:36,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:36,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068039393] [2021-02-23 13:13:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:36,848 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:36,871 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:36,916 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:13:36,917 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:13:36,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:13:36,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:13:36 BoogieIcfgContainer [2021-02-23 13:13:36,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:13:36,980 INFO L168 Benchmark]: Toolchain (without parser) took 2672.55 ms. Allocated memory was 164.6 MB in the beginning and 225.4 MB in the end (delta: 60.8 MB). Free memory was 139.4 MB in the beginning and 162.7 MB in the end (delta: -23.3 MB). Peak memory consumption was 38.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:36,981 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:36,982 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.18 ms. Allocated memory is still 164.6 MB. Free memory was 138.4 MB in the beginning and 128.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:36,983 INFO L168 Benchmark]: Boogie Preprocessor took 43.84 ms. Allocated memory is still 164.6 MB. Free memory was 127.9 MB in the beginning and 126.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:36,983 INFO L168 Benchmark]: RCFGBuilder took 570.68 ms. Allocated memory is still 164.6 MB. Free memory was 126.2 MB in the beginning and 142.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:36,984 INFO L168 Benchmark]: TraceAbstraction took 1752.77 ms. Allocated memory was 164.6 MB in the beginning and 225.4 MB in the end (delta: 60.8 MB). Free memory was 142.4 MB in the beginning and 162.7 MB in the end (delta: -20.3 MB). Peak memory consumption was 40.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:36,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.18 ms. Allocated memory is still 164.6 MB. Free memory was 138.4 MB in the beginning and 128.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.84 ms. Allocated memory is still 164.6 MB. Free memory was 127.9 MB in the beginning and 126.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 570.68 ms. Allocated memory is still 164.6 MB. Free memory was 126.2 MB in the beginning and 142.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1752.77 ms. Allocated memory was 164.6 MB in the beginning and 225.4 MB in the end (delta: 60.8 MB). Free memory was 142.4 MB in the beginning and 162.7 MB in the end (delta: -20.3 MB). Peak memory consumption was 40.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: 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 80, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L74] float x = -0.0f; [L75] float y = 0.0f; VAL [y=0] [L77] CALL, EXPR fmax_float(x, y) VAL [\old(x)=4286578692, \old(y)=0] [L45] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578692] [L22] __uint32_t w; VAL [\old(x)=4286578692, x=4286578692] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578692, w=4286578689, x=4286578692] [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; VAL [\old(x)=4286578692, \result=0, w=4286578689, x=4286578692] [L45] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578692, \old(y)=0, __fpclassify_float(x)=0, x=4286578692, y=0] [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; VAL [\old(x)=4286578692, \old(y)=0, \result=0, x=4286578692, y=0] [L77] RET, EXPR fmax_float(x, y) VAL [fmax_float(x, y)=0, x=4286578692, y=0] [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=0, res == 0.0f && __signbit_float(res) == 0=0, x=4286578692, y=0] [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() VAL [res=0, x=4286578692, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 24 SDslu, 254 SDs, 0 SdLazy, 180 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 5598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...