/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_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:37:38,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:37:38,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:37:38,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:37:38,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:37:38,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:37:38,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:37:38,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:37:38,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:37:38,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:37:38,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:37:38,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:37:38,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:37:38,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:37:38,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:37:38,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:37:38,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:37:38,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:37:38,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:37:38,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:37:38,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:37:38,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:37:38,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:37:38,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:37:38,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:37:38,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:37:38,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:37:38,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:37:38,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:37:38,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:37:38,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:37:38,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:37:38,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:37:38,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:37:38,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:37:38,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:37:38,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:37:38,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:37:38,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:37:38,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:37:38,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:37:38,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:37:38,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:37:38,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:37:38,848 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:37:38,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:37:38,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:37:38,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:37:38,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:37:38,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:37:38,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:37:38,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:37:39,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:37:39,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:37:39,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:37:39,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:37:39,281 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:37:39,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2021-02-23 17:37:39,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3961e37f8/eebbdd081f8c4df6962b23a31e281a22/FLAG8b9093e4d [2021-02-23 17:37:39,956 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:37:39,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2021-02-23 17:37:39,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3961e37f8/eebbdd081f8c4df6962b23a31e281a22/FLAG8b9093e4d [2021-02-23 17:37:40,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3961e37f8/eebbdd081f8c4df6962b23a31e281a22 [2021-02-23 17:37:40,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:37:40,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:37:40,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:37:40,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:37:40,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:37:40,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d07a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40, skipping insertion in model container [2021-02-23 17:37:40,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:37:40,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:37:40,545 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_0730b.c[2069,2082] [2021-02-23 17:37:40,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:37:40,558 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:37:40,592 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_0730b.c[2069,2082] [2021-02-23 17:37:40,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:37:40,611 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:37:40,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40 WrapperNode [2021-02-23 17:37:40,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:37:40,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:37:40,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:37:40,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:37:40,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (1/1) ... [2021-02-23 17:37:40,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:37:40,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:37:40,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:37:40,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:37:40,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (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 17:37:40,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:37:40,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:37:40,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:37:40,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2021-02-23 17:37:40,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 17:37:40,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:37:40,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:37:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:37:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:37:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:37:40,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 17:37:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2021-02-23 17:37:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 17:37:40,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:37:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:37:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:37:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 17:37:40,786 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 17:37:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:37:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:37:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:37:40,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:37:41,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:37:41,565 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-02-23 17:37:41,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:41 BoogieIcfgContainer [2021-02-23 17:37:41,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:37:41,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:37:41,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:37:41,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:37:41,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:37:40" (1/3) ... [2021-02-23 17:37:41,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abb674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:41, skipping insertion in model container [2021-02-23 17:37:41,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:40" (2/3) ... [2021-02-23 17:37:41,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abb674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:41, skipping insertion in model container [2021-02-23 17:37:41,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:41" (3/3) ... [2021-02-23 17:37:41,581 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2021-02-23 17:37:41,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:37:41,598 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:37:41,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:37:41,660 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:37:41,660 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:37:41,660 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:37:41,661 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:37:41,661 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:37:41,662 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:37:41,662 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:37:41,662 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:37:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2021-02-23 17:37:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 17:37:41,703 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:37:41,704 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] [2021-02-23 17:37:41,704 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:37:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:37:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash -578346295, now seen corresponding path program 1 times [2021-02-23 17:37:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:37:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041433949] [2021-02-23 17:37:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:37:41,814 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:37:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:41,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:41,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:41,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:41,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:42,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:37:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:42,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:42,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:42,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:37:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:37:42,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:42,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:42,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:37:42,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:37:42,134 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 17:37:42,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041433949] [2021-02-23 17:37:42,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:37:42,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:37:42,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161748830] [2021-02-23 17:37:42,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:37:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:37:42,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:37:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:37:42,170 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 4 states. [2021-02-23 17:37:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:37:42,708 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2021-02-23 17:37:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:37:42,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2021-02-23 17:37:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:37:42,722 INFO L225 Difference]: With dead ends: 213 [2021-02-23 17:37:42,722 INFO L226 Difference]: Without dead ends: 112 [2021-02-23 17:37:42,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:37:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-23 17:37:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-02-23 17:37:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-02-23 17:37:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-02-23 17:37:42,792 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 40 [2021-02-23 17:37:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:37:42,793 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-02-23 17:37:42,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:37:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-02-23 17:37:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 17:37:42,799 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:37:42,799 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] [2021-02-23 17:37:42,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:37:42,801 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:37:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:37:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash -698251999, now seen corresponding path program 1 times [2021-02-23 17:37:42,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:37:42,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776134841] [2021-02-23 17:37:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:37:42,812 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:37:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:37:42,882 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:37:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:37:42,925 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:37:42,987 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:37:42,987 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:37:42,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:37:43,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:37:43 BoogieIcfgContainer [2021-02-23 17:37:43,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:37:43,017 INFO L168 Benchmark]: Toolchain (without parser) took 2693.21 ms. Allocated memory was 161.5 MB in the beginning and 210.8 MB in the end (delta: 49.3 MB). Free memory was 137.5 MB in the beginning and 160.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:43,018 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 135.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:37:43,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.32 ms. Allocated memory is still 161.5 MB. Free memory was 136.3 MB in the beginning and 124.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:43,023 INFO L168 Benchmark]: Boogie Preprocessor took 51.74 ms. Allocated memory is still 161.5 MB. Free memory was 124.9 MB in the beginning and 123.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:43,024 INFO L168 Benchmark]: RCFGBuilder took 902.47 ms. Allocated memory is still 161.5 MB. Free memory was 123.0 MB in the beginning and 132.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:43,025 INFO L168 Benchmark]: TraceAbstraction took 1441.66 ms. Allocated memory was 161.5 MB in the beginning and 210.8 MB in the end (delta: 49.3 MB). Free memory was 131.6 MB in the beginning and 160.8 MB in the end (delta: -29.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:37:43,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 135.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.32 ms. Allocated memory is still 161.5 MB. Free memory was 136.3 MB in the beginning and 124.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.74 ms. Allocated memory is still 161.5 MB. Free memory was 124.9 MB in the beginning and 123.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 902.47 ms. Allocated memory is still 161.5 MB. Free memory was 123.0 MB in the beginning and 132.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1441.66 ms. Allocated memory was 161.5 MB in the beginning and 210.8 MB in the end (delta: 49.3 MB). Free memory was 131.6 MB in the beginning and 160.8 MB in the end (delta: -29.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 108]: 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 107, overapproximation of bitwiseAnd at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L14] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L103] float x = 0.0f; [L104] CALL, EXPR __ieee754_sqrtf(x) [L17] float z; [L18] __uint32_t r, hx; [L19] __int32_t ix, s, q, m, t, i; [L22] ieee_float_shape_type gf_u; [L23] gf_u.value = (x) [L24] EXPR gf_u.word [L24] (ix) = gf_u.word [L26] hx = ix & 0x7fffffff [L28] COND TRUE !((hx) < 0x7f800000L) [L29] return x * x + x; [L104] RET, EXPR __ieee754_sqrtf(x) [L104] float res = __ieee754_sqrtf(x); [L107] EXPR res == 0.0f && __signbit_float(res) == 0 [L107] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L108] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 127 SDtfs, 27 SDslu, 95 SDs, 0 SdLazy, 133 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 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...