/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:33:48,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:33:48,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:33:48,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:33:48,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:33:48,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:33:48,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:33:48,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:33:48,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:33:48,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:33:48,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:33:48,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:33:48,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:33:48,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:33:48,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:33:48,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:33:48,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:33:48,602 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 22:33:48,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:33:48,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:33:48,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:33:48,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:33:48,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:33:48,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:33:48,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:33:48,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:33:48,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:33:48,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:33:48,618 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:33:48,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:33:48,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:33:48,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:33:48,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:33:48,619 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:33:48,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:33:48,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:33:48,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:33:48,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:33:48,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:33:48,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:33:48,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:33:48,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:33:49,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:33:49,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:33:49,005 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:33:49,005 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:33:49,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2021-02-23 22:33:49,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50d8507/166a1caaa00e44a7a8a622b28d2cc178/FLAG2f37efc1e [2021-02-23 22:33:49,719 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:33:49,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2021-02-23 22:33:49,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50d8507/166a1caaa00e44a7a8a622b28d2cc178/FLAG2f37efc1e [2021-02-23 22:33:50,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef50d8507/166a1caaa00e44a7a8a622b28d2cc178 [2021-02-23 22:33:50,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:33:50,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:33:50,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:33:50,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:33:50,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:33:50,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755cbd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50, skipping insertion in model container [2021-02-23 22:33:50,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:33:50,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:33:50,318 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/double_req_bl_1011b.c[1211,1224] [2021-02-23 22:33:50,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:33:50,333 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:33:50,357 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/double_req_bl_1011b.c[1211,1224] [2021-02-23 22:33:50,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:33:50,376 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:33:50,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50 WrapperNode [2021-02-23 22:33:50,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:33:50,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:33:50,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:33:50,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:33:50,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (1/1) ... [2021-02-23 22:33:50,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:33:50,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:33:50,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:33:50,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:33:50,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (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 22:33:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:33:50,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:33:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:33:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2021-02-23 22:33:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2021-02-23 22:33:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:33:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:33:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:33:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:33:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:33:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2021-02-23 22:33:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:33:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:33:50,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:33:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2021-02-23 22:33:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:33:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:33:50,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:33:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:33:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:33:50,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:33:51,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:33:51,037 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:33:51,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:33:51 BoogieIcfgContainer [2021-02-23 22:33:51,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:33:51,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:33:51,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:33:51,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:33:51,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:33:50" (1/3) ... [2021-02-23 22:33:51,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bcfc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:33:51, skipping insertion in model container [2021-02-23 22:33:51,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:33:50" (2/3) ... [2021-02-23 22:33:51,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bcfc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:33:51, skipping insertion in model container [2021-02-23 22:33:51,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:33:51" (3/3) ... [2021-02-23 22:33:51,049 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1011b.c [2021-02-23 22:33:51,056 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:33:51,061 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:33:51,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:33:51,111 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:33:51,112 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:33:51,112 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:33:51,112 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:33:51,112 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:33:51,112 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:33:51,113 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:33:51,113 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:33:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2021-02-23 22:33:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 22:33:51,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:33:51,141 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] [2021-02-23 22:33:51,142 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:33:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:33:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash 240757498, now seen corresponding path program 1 times [2021-02-23 22:33:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:33:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805438834] [2021-02-23 22:33:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:33:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:33:51,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:33:51,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:33:51,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:33:51,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:33:51,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:33:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:33:51,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:33:51,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:33:51,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:33:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:33:51,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:33:51,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:33:51,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:33:51,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:33:51,479 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 22:33:51,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805438834] [2021-02-23 22:33:51,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:33:51,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:33:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902469329] [2021-02-23 22:33:51,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:33:51,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:33:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:33:51,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:33:51,506 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2021-02-23 22:33:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:33:51,913 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-02-23 22:33:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:33:51,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 22:33:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:33:51,925 INFO L225 Difference]: With dead ends: 121 [2021-02-23 22:33:51,926 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 22:33:51,930 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 22:33:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 22:33:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-02-23 22:33:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-23 22:33:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-02-23 22:33:51,984 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 29 [2021-02-23 22:33:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:33:51,985 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-02-23 22:33:51,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:33:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-02-23 22:33:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 22:33:51,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:33:51,988 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] [2021-02-23 22:33:51,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:33:51,988 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:33:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:33:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1317132015, now seen corresponding path program 1 times [2021-02-23 22:33:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:33:51,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498167953] [2021-02-23 22:33:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:33:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:33:52,046 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:33:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:33:52,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:33:52,121 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:33:52,122 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:33:52,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:33:52,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:33:52 BoogieIcfgContainer [2021-02-23 22:33:52,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:33:52,181 INFO L168 Benchmark]: Toolchain (without parser) took 2077.40 ms. Allocated memory is still 164.6 MB. Free memory was 140.3 MB in the beginning and 84.0 MB in the end (delta: 56.4 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:33:52,182 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 138.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:33:52,183 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.32 ms. Allocated memory is still 164.6 MB. Free memory was 139.3 MB in the beginning and 128.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:33:52,184 INFO L168 Benchmark]: Boogie Preprocessor took 44.56 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:33:52,187 INFO L168 Benchmark]: RCFGBuilder took 615.85 ms. Allocated memory is still 164.6 MB. Free memory was 127.2 MB in the beginning and 142.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:33:52,188 INFO L168 Benchmark]: TraceAbstraction took 1135.07 ms. Allocated memory is still 164.6 MB. Free memory was 141.6 MB in the beginning and 84.0 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:33:52,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 138.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.32 ms. Allocated memory is still 164.6 MB. Free memory was 139.3 MB in the beginning and 128.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.56 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 615.85 ms. Allocated memory is still 164.6 MB. Free memory was 127.2 MB in the beginning and 142.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1135.07 ms. Allocated memory is still 164.6 MB. Free memory was 141.6 MB in the beginning and 84.0 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 54]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of someUnaryDOUBLEoperation at line 49, overapproximation of bitwiseAnd at line 37. Possible FailurePath: [L49] double x = -0.0; [L50] CALL, EXPR fabs_double(x) VAL [\old(x)=62] [L28] __uint32_t high; VAL [\old(x)=62, x=62] [L30] ieee_double_shape_type gh_u; VAL [\old(x)=62, gh_u={9:0}, x=62] [L31] gh_u.value = (x) VAL [\old(x)=62, gh_u={9:0}, x=62] [L32] EXPR gh_u.parts.msw VAL [\old(x)=62, gh_u={9:0}, gh_u.parts.msw=52, x=62] [L32] (high) = gh_u.parts.msw VAL [\old(x)=62, gh_u={9:0}, gh_u.parts.msw=52, high=52, x=62] [L35] ieee_double_shape_type sh_u; VAL [\old(x)=62, high=52, sh_u={3:0}, x=62] [L36] sh_u.value = (x) VAL [\old(x)=62, high=52, sh_u={3:0}, x=62] [L37] sh_u.parts.msw = (high & 0x7fffffff) VAL [\old(x)=62, high=52, sh_u={3:0}, x=62] [L38] EXPR sh_u.value VAL [\old(x)=62, high=52, sh_u={3:0}, sh_u.value=62, x=62] [L38] (x) = sh_u.value VAL [\old(x)=62, high=52, sh_u={3:0}, sh_u.value=62, x=62] [L40] return x; VAL [\old(x)=62, \result=62, high=52, x=62] [L50] RET, EXPR fabs_double(x) VAL [fabs_double(x)=62, x=62] [L50] double res = fabs_double(x); VAL [fabs_double(x)=62, res=62, x=62] [L53] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=62, res == 0.0 && __signbit_double(res) == 0=0, x=62] [L53] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) VAL [res=62, res == 0.0 && __signbit_double(res) == 0=0, x=62] [L54] reach_error() VAL [res=62, x=62] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 11 SDslu, 42 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s 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=69occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 1960 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...