/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 0.2.0-b8ad66e [2020-10-24 00:31:52,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:31:52,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:31:52,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:31:52,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:31:52,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:31:52,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:31:52,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:31:52,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:31:52,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:31:52,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:31:52,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:31:52,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:31:52,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:31:52,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:31:52,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:31:52,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:31:52,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 00:31:52,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 00:31:52,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 00:31:52,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:31:52,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:31:52,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:31:52,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:31:52,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:31:52,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:31:52,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:31:52,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:31:52,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:31:52,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:31:52,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:31:52,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:31:52,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:31:52,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:31:52,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:31:52,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:31:52,639 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:31:52,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:31:52,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:31:52,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:31:52,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:31:52,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:31:52,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:31:52,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:31:53,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:31:53,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:31:53,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:31:53,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:31:53,102 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:31:53,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2020-10-24 00:31:53,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a496d54c/35044d3929584adc91ec1371caf85122/FLAG6acc7a04f [2020-10-24 00:31:53,789 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:31:53,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2020-10-24 00:31:53,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a496d54c/35044d3929584adc91ec1371caf85122/FLAG6acc7a04f [2020-10-24 00:31:54,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a496d54c/35044d3929584adc91ec1371caf85122 [2020-10-24 00:31:54,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:31:54,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:31:54,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:31:54,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:31:54,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:31:54,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2613b454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54, skipping insertion in model container [2020-10-24 00:31:54,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:31:54,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:31:54,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:31:54,415 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:31:54,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:31:54,456 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:31:54,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54 WrapperNode [2020-10-24 00:31:54,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:31:54,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:31:54,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:31:54,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:31:54,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (1/1) ... [2020-10-24 00:31:54,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:31:54,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:31:54,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:31:54,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:31:54,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (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 [2020-10-24 00:31:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:31:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:31:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:31:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-10-24 00:31:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2020-10-24 00:31:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:31:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:31:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:31:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:31:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:31:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-10-24 00:31:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 00:31:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:31:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:31:54,597 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2020-10-24 00:31:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:31:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-24 00:31:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:31:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:31:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:31:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:31:55,166 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:31:55,168 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-24 00:31:55,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:31:55 BoogieIcfgContainer [2020-10-24 00:31:55,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:31:55,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:31:55,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:31:55,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:31:55,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:31:54" (1/3) ... [2020-10-24 00:31:55,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bc4c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:31:55, skipping insertion in model container [2020-10-24 00:31:55,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:31:54" (2/3) ... [2020-10-24 00:31:55,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bc4c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:31:55, skipping insertion in model container [2020-10-24 00:31:55,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:31:55" (3/3) ... [2020-10-24 00:31:55,181 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1011b.c [2020-10-24 00:31:55,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:31:55,201 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:31:55,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:31:55,252 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:31:55,252 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:31:55,252 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:31:55,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:31:55,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:31:55,253 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:31:55,253 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:31:55,253 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:31:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-10-24 00:31:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-24 00:31:55,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:31:55,289 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] [2020-10-24 00:31:55,290 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:31:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:31:55,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1693987552, now seen corresponding path program 1 times [2020-10-24 00:31:55,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:31:55,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951199312] [2020-10-24 00:31:55,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:31:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:31:55,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:31:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:31:55,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:31:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:31:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:31:55,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951199312] [2020-10-24 00:31:55,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:31:55,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:31:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701209497] [2020-10-24 00:31:55,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:31:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:31:55,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:31:55,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:31:55,652 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 4 states. [2020-10-24 00:31:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:31:55,912 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-24 00:31:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:31:55,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-24 00:31:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:31:55,923 INFO L225 Difference]: With dead ends: 139 [2020-10-24 00:31:55,923 INFO L226 Difference]: Without dead ends: 69 [2020-10-24 00:31:55,927 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 [2020-10-24 00:31:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-24 00:31:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-24 00:31:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-24 00:31:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-24 00:31:55,981 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 30 [2020-10-24 00:31:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:31:55,981 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-24 00:31:55,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:31:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-24 00:31:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 00:31:55,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:31:55,984 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] [2020-10-24 00:31:55,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:31:55,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:31:55,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:31:55,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1952476164, now seen corresponding path program 1 times [2020-10-24 00:31:55,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:31:55,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751422179] [2020-10-24 00:31:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:31:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:31:56,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:31:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:31:56,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:31:56,138 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:31:56,140 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:31:56,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:31:56,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:31:56 BoogieIcfgContainer [2020-10-24 00:31:56,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:31:56,224 INFO L168 Benchmark]: Toolchain (without parser) took 2077.63 ms. Allocated memory is still 155.2 MB. Free memory was 131.0 MB in the beginning and 84.4 MB in the end (delta: 46.5 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-10-24 00:31:56,226 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory was 127.1 MB in the beginning and 127.0 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:31:56,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.56 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 120.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 00:31:56,231 INFO L168 Benchmark]: Boogie Preprocessor took 47.47 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 118.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:31:56,232 INFO L168 Benchmark]: RCFGBuilder took 663.93 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 97.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:31:56,234 INFO L168 Benchmark]: TraceAbstraction took 1046.06 ms. Allocated memory is still 155.2 MB. Free memory was 97.4 MB in the beginning and 84.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. [2020-10-24 00:31:56,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 155.2 MB. Free memory was 127.1 MB in the beginning and 127.0 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 304.56 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 120.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.47 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 118.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 663.93 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 97.9 MB in the end (delta: 20.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1046.06 ms. Allocated memory is still 155.2 MB. Free memory was 97.4 MB in the beginning and 84.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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)=51] [L28] __uint32_t high; VAL [\old(x)=51, x=51] [L30] ieee_double_shape_type gh_u; VAL [\old(x)=51, gh_u={9:0}, x=51] [L31] gh_u.value = (x) VAL [\old(x)=51, gh_u={9:0}, x=51] [L32] EXPR gh_u.parts.msw VAL [\old(x)=51, gh_u={9:0}, gh_u.parts.msw=53, x=51] [L32] (high) = gh_u.parts.msw VAL [\old(x)=51, gh_u={9:0}, gh_u.parts.msw=53, high=53, x=51] [L35] ieee_double_shape_type sh_u; VAL [\old(x)=51, high=53, sh_u={3:0}, x=51] [L36] sh_u.value = (x) VAL [\old(x)=51, high=53, sh_u={3:0}, x=51] [L37] sh_u.parts.msw = (high & 0x7fffffff) VAL [\old(x)=51, high=53, sh_u={3:0}, x=51] [L38] EXPR sh_u.value VAL [\old(x)=51, high=53, sh_u={3:0}, sh_u.value=51, x=51] [L38] (x) = sh_u.value VAL [(x) = sh_u.value=68, (x) = sh_u.value=50, \old(x)=51, high=53, sh_u={3:0}, sh_u.value=51, x=51] [L40] return x; VAL [\old(x)=51, \result=51, high=53, x=51] [L50] RET, EXPR fabs_double(x) VAL [fabs_double(x)=51, x=51] [L50] double res = fabs_double(x); VAL [fabs_double(x)=51, res=51, x=51] [L53] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=51, res == 0.0 && __signbit_double(res) == 0=0, x=51] [L53] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) VAL [res=51, res == 0.0 && __signbit_double(res) == 0=0, x=51] [L54] CALL reach_error() [L3] __assert_fail("0", "double_req_bl_1011b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 13 SDslu, 44 SDs, 0 SdLazy, 88 SolverSat, 8 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=79occurred 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, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 2059 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...