/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:10:55,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:10:55,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:10:55,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:10:55,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:10:55,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:10:55,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:10:55,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:10:55,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:10:55,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:10:55,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:10:55,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:10:55,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:10:55,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:10:55,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:10:55,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:10:55,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:10:55,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:10:55,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:10:55,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:10:55,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:10:55,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:10:55,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:10:55,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:10:55,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:10:55,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:10:55,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:10:55,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:10:55,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:10:55,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:10:55,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:10:55,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:10:55,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:10:55,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:10:55,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:10:55,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:10:55,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:10:55,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:10:55,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:10:55,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:10:55,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:10:55,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:10:55,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:10:55,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:10:55,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:10:55,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:10:55,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:10:55,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:10:55,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:10:55,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:10:55,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:10:55,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:10:55,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:10:55,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:10:55,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:10:55,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:10:55,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:10:55,771 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:10:55,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:10:55,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:10:55,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:10:55,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:10:55,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:10:55,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:10:55,772 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:10:56,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:10:56,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:10:56,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:10:56,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:10:56,223 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:10:56,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2021-02-21 20:10:56,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c4fe7a76/bea7ca34b7b14aa880a8dd2e48bc9ee4/FLAG29ce42b6f [2021-02-21 20:10:56,979 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:10:56,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2021-02-21 20:10:56,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c4fe7a76/bea7ca34b7b14aa880a8dd2e48bc9ee4/FLAG29ce42b6f [2021-02-21 20:10:57,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c4fe7a76/bea7ca34b7b14aa880a8dd2e48bc9ee4 [2021-02-21 20:10:57,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:10:57,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:10:57,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:57,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:10:57,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:10:57,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23839a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57, skipping insertion in model container [2021-02-21 20:10:57,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:10:57,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:10:57,621 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_1232b.c[1657,1670] [2021-02-21 20:10:57,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:57,644 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:10:57,670 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_1232b.c[1657,1670] [2021-02-21 20:10:57,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:57,691 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:10:57,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57 WrapperNode [2021-02-21 20:10:57,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:57,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:10:57,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:10:57,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:10:57,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (1/1) ... [2021-02-21 20:10:57,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:10:57,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:10:57,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:10:57,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:10:57,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (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 20:10:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:10:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:10:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:10:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-02-21 20:10:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2021-02-21 20:10:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 20:10:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:10:57,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:10:57,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:10:57,854 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:10:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:10:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-21 20:10:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-02-21 20:10:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:10:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:10:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:10:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2021-02-21 20:10:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 20:10:57,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:10:57,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:10:57,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:10:57,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:10:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:10:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:10:58,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:10:58,281 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-21 20:10:58,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:58 BoogieIcfgContainer [2021-02-21 20:10:58,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:10:58,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:10:58,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:10:58,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:10:58,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:10:57" (1/3) ... [2021-02-21 20:10:58,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6c7d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:58, skipping insertion in model container [2021-02-21 20:10:58,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:57" (2/3) ... [2021-02-21 20:10:58,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6c7d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:58, skipping insertion in model container [2021-02-21 20:10:58,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:58" (3/3) ... [2021-02-21 20:10:58,293 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2021-02-21 20:10:58,301 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:10:58,306 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:10:58,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:10:58,357 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:10:58,358 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:10:58,358 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:10:58,358 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:10:58,358 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:10:58,358 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:10:58,358 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:10:58,359 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:10:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2021-02-21 20:10:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-21 20:10:58,394 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:58,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:58,395 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash 515290282, now seen corresponding path program 1 times [2021-02-21 20:10:58,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:58,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678322826] [2021-02-21 20:10:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:58,527 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:58,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:58,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:10:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:58,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:10:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:58,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:58,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:58,902 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 20:10:58,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678322826] [2021-02-21 20:10:58,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:58,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:10:58,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603934384] [2021-02-21 20:10:58,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:10:58,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:58,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:10:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:10:58,931 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 4 states. [2021-02-21 20:10:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:59,265 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2021-02-21 20:10:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:10:59,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2021-02-21 20:10:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:59,278 INFO L225 Difference]: With dead ends: 161 [2021-02-21 20:10:59,278 INFO L226 Difference]: Without dead ends: 82 [2021-02-21 20:10:59,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:10:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-21 20:10:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-02-21 20:10:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-21 20:10:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-02-21 20:10:59,347 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 39 [2021-02-21 20:10:59,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:59,348 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-02-21 20:10:59,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:10:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-02-21 20:10:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 20:10:59,352 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:59,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:59,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:10:59,353 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash -97548509, now seen corresponding path program 1 times [2021-02-21 20:10:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:59,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958899645] [2021-02-21 20:10:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:59,358 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:59,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:59,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:10:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:59,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:10:59,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:10:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:59,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:59,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:59,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:10:59,702 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 20:10:59,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958899645] [2021-02-21 20:10:59,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:59,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:10:59,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980117047] [2021-02-21 20:10:59,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:10:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:10:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:10:59,716 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 6 states. [2021-02-21 20:11:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:00,012 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-02-21 20:11:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:11:00,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-02-21 20:11:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:00,016 INFO L225 Difference]: With dead ends: 116 [2021-02-21 20:11:00,017 INFO L226 Difference]: Without dead ends: 87 [2021-02-21 20:11:00,018 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 [2021-02-21 20:11:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-21 20:11:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-02-21 20:11:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:11:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-21 20:11:00,036 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 46 [2021-02-21 20:11:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:00,037 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-21 20:11:00,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:11:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-21 20:11:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 20:11:00,039 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:00,039 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, 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 20:11:00,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:11:00,040 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 668113358, now seen corresponding path program 1 times [2021-02-21 20:11:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:00,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510866785] [2021-02-21 20:11:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:00,044 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:11:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:00,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:11:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:00,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:00,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:00,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:00,261 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 20:11:00,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510866785] [2021-02-21 20:11:00,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:00,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:11:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140823073] [2021-02-21 20:11:00,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:11:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:11:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:11:00,264 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 6 states. [2021-02-21 20:11:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:00,500 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-02-21 20:11:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:11:00,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-02-21 20:11:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:00,503 INFO L225 Difference]: With dead ends: 120 [2021-02-21 20:11:00,503 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 20:11:00,504 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 [2021-02-21 20:11:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 20:11:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-02-21 20:11:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:11:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-02-21 20:11:00,519 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 49 [2021-02-21 20:11:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:00,519 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-02-21 20:11:00,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:11:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-02-21 20:11:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-21 20:11:00,521 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:00,521 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, 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 20:11:00,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:11:00,522 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1380588046, now seen corresponding path program 1 times [2021-02-21 20:11:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:00,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723590078] [2021-02-21 20:11:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:00,526 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:00,549 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:00,574 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:00,623 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:11:00,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:11:00,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:11:00,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:11:00 BoogieIcfgContainer [2021-02-21 20:11:00,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:11:00,655 INFO L168 Benchmark]: Toolchain (without parser) took 3300.92 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.5 MB in the beginning and 117.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 41.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:00,656 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:11:00,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:00,661 INFO L168 Benchmark]: Boogie Preprocessor took 43.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:00,662 INFO L168 Benchmark]: RCFGBuilder took 545.77 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 123.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:00,670 INFO L168 Benchmark]: TraceAbstraction took 2367.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 123.1 MB in the beginning and 117.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:00,677 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 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 320.12 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.81 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 545.77 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 123.6 MB in the end (delta: -9.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2367.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 123.1 MB in the beginning and 117.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: 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 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L68] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] RET, EXPR __fpclassify_float(x) [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] RET, EXPR fmin_float(x, y) [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 270 SDtfs, 53 SDslu, 492 SDs, 0 SdLazy, 364 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s 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=90occurred 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...