/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0740.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:31:44,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:31:44,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:31:44,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:31:44,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:31:44,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:31:44,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:31:44,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:31:44,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:31:44,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:31:44,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:31:44,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:31:44,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:31:44,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:31:44,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:31:44,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:31:44,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:31:44,600 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:31:44,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:31:44,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:31:44,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:31:44,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:31:44,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:31:44,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:31:44,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:31:44,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:31:44,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:31:44,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:31:44,617 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:31:44,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:31:44,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:31:44,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:31:44,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:31:44,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:31:44,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:31:44,619 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:31:44,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:31:44,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:31:44,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:31:44,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:31:44,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:31:44,984 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:31:44,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0740.c [2021-02-22 01:31:45,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fce21bb/0389079cd25a44b8bb99f021acef803b/FLAG285471614 [2021-02-22 01:31:45,655 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:31:45,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0740.c [2021-02-22 01:31:45,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fce21bb/0389079cd25a44b8bb99f021acef803b/FLAG285471614 [2021-02-22 01:31:46,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fce21bb/0389079cd25a44b8bb99f021acef803b [2021-02-22 01:31:46,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:31:46,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:31:46,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:31:46,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:31:46,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:31:46,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51e07a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46, skipping insertion in model container [2021-02-22 01:31:46,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:31:46,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:31:46,256 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_0740.c[1930,1943] [2021-02-22 01:31:46,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:31:46,269 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:31:46,299 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_0740.c[1930,1943] [2021-02-22 01:31:46,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:31:46,317 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:31:46,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46 WrapperNode [2021-02-22 01:31:46,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:31:46,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:31:46,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:31:46,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:31:46,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (1/1) ... [2021-02-22 01:31:46,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:31:46,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:31:46,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:31:46,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:31:46,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (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 [2021-02-22 01:31:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:31:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:31:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:31:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-22 01:31:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2021-02-22 01:31:46,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:31:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:31:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:31:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:31:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:31:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-22 01:31:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-22 01:31:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2021-02-22 01:31:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-22 01:31:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:31:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:31:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:31:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-22 01:31:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:31:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:31:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:31:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:31:46,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:31:46,916 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-22 01:31:46,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:31:46 BoogieIcfgContainer [2021-02-22 01:31:46,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:31:46,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:31:46,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:31:46,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:31:46,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:31:46" (1/3) ... [2021-02-22 01:31:46,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ac975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:31:46, skipping insertion in model container [2021-02-22 01:31:46,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:31:46" (2/3) ... [2021-02-22 01:31:46,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ac975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:31:46, skipping insertion in model container [2021-02-22 01:31:46,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:31:46" (3/3) ... [2021-02-22 01:31:46,935 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0740.c [2021-02-22 01:31:46,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:31:46,947 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:31:46,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:31:46,999 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:31:46,999 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:31:46,999 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:31:46,999 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:31:46,999 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:31:47,000 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:31:47,000 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:31:47,000 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:31:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-22 01:31:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-22 01:31:47,032 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:31:47,033 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] [2021-02-22 01:31:47,033 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:31:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:31:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1576615721, now seen corresponding path program 1 times [2021-02-22 01:31:47,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:31:47,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159866619] [2021-02-22 01:31:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:31:47,137 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:31:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:31:47,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:31:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:31:47,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:31:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:31:47,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-02-22 01:31:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:31:47,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:31:47,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:31:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:31:47,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159866619] [2021-02-22 01:31:47,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:31:47,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:31:47,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261833338] [2021-02-22 01:31:47,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:31:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:31:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:31:47,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:31:47,413 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2021-02-22 01:31:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:31:47,849 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2021-02-22 01:31:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:31:47,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2021-02-22 01:31:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:31:47,865 INFO L225 Difference]: With dead ends: 185 [2021-02-22 01:31:47,865 INFO L226 Difference]: Without dead ends: 99 [2021-02-22 01:31:47,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 01:31:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-22 01:31:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-02-22 01:31:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-22 01:31:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-02-22 01:31:47,959 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 43 [2021-02-22 01:31:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:31:47,960 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-02-22 01:31:47,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:31:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-02-22 01:31:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-22 01:31:47,963 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:31:47,963 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, 1] [2021-02-22 01:31:47,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:31:47,965 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:31:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:31:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1265194154, now seen corresponding path program 1 times [2021-02-22 01:31:47,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:31:47,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424415358] [2021-02-22 01:31:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:31:47,974 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:31:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:31:48,065 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:31:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:31:48,101 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:31:48,138 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:31:48,139 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:31:48,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:31:48,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:31:48 BoogieIcfgContainer [2021-02-22 01:31:48,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:31:48,160 INFO L168 Benchmark]: Toolchain (without parser) took 2127.41 ms. Allocated memory was 166.7 MB in the beginning and 219.2 MB in the end (delta: 52.4 MB). Free memory was 142.7 MB in the beginning and 189.8 MB in the end (delta: -47.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:31:48,161 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 166.7 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:31:48,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.75 ms. Allocated memory is still 166.7 MB. Free memory was 141.5 MB in the beginning and 130.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:31:48,163 INFO L168 Benchmark]: Boogie Preprocessor took 44.42 ms. Allocated memory is still 166.7 MB. Free memory was 130.7 MB in the beginning and 128.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:31:48,164 INFO L168 Benchmark]: RCFGBuilder took 558.47 ms. Allocated memory is still 166.7 MB. Free memory was 128.7 MB in the beginning and 138.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:31:48,167 INFO L168 Benchmark]: TraceAbstraction took 1233.66 ms. Allocated memory was 166.7 MB in the beginning and 219.2 MB in the end (delta: 52.4 MB). Free memory was 138.2 MB in the beginning and 189.8 MB in the end (delta: -51.7 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. [2021-02-22 01:31:48,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 166.7 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.75 ms. Allocated memory is still 166.7 MB. Free memory was 141.5 MB in the beginning and 130.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.42 ms. Allocated memory is still 166.7 MB. Free memory was 130.7 MB in the beginning and 128.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 558.47 ms. Allocated memory is still 166.7 MB. Free memory was 128.7 MB in the beginning and 138.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1233.66 ms. Allocated memory was 166.7 MB in the beginning and 219.2 MB in the end (delta: 52.4 MB). Free memory was 138.2 MB in the beginning and 189.8 MB in the end (delta: -51.7 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 99]: 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 15, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 29. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L93] float x = -1.0f / 0.0f; [L95] CALL, EXPR __ieee754_sqrtf(x) [L20] float z; [L21] __uint32_t r, hx; [L22] __int32_t ix, s, q, m, t, i; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L29] hx = ix & 0x7fffffff [L31] COND TRUE !((hx) < 0x7f800000L) [L32] return x * x + x; [L95] RET, EXPR __ieee754_sqrtf(x) [L95] float res = __ieee754_sqrtf(x); [L98] CALL, EXPR isnan_float(res) [L15] return x != x; [L98] RET, EXPR isnan_float(res) [L98] COND TRUE !isnan_float(res) [L99] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 109 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 29 SDslu, 81 SDs, 0 SdLazy, 114 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred 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...