/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/float_req_bl_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:46:47,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:46:47,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:46:47,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:46:47,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:46:47,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:46:47,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:46:47,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:46:47,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:46:47,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:46:47,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:46:47,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:46:47,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:46:47,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:46:47,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:46:47,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:46:47,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:46:47,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:46:47,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:46:47,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:46:47,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:46:47,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:46:47,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:46:47,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:46:47,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:46:47,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:46:47,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:46:47,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:46:47,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 04:46:47,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:46:47,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:46:47,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:46:47,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:46:47,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:46:47,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:46:47,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:46:47,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:46:47,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:46:47,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:46:47,755 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:46:47,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:46:47,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:46:47,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:46:47,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:46:47,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:46:47,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:46:47,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:46:48,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:46:48,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:46:48,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:46:48,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:46:48,199 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:46:48,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-11-07 04:46:48,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77af0e34/db238bae59a547eda214a1c16b425375/FLAG1c835c95c [2020-11-07 04:46:48,938 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:46:48,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-11-07 04:46:48,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77af0e34/db238bae59a547eda214a1c16b425375/FLAG1c835c95c [2020-11-07 04:46:49,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77af0e34/db238bae59a547eda214a1c16b425375 [2020-11-07 04:46:49,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:46:49,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:46:49,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:49,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:46:49,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:46:49,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d3348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49, skipping insertion in model container [2020-11-07 04:46:49,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:46:49,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:46:49,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:49,534 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:46:49,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:49,580 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:46:49,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49 WrapperNode [2020-11-07 04:46:49,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:49,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:46:49,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:46:49,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:46:49,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (1/1) ... [2020-11-07 04:46:49,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:46:49,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:46:49,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:46:49,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:46:49,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (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 [2020-11-07 04:46:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:46:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:46:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:46:49,719 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-11-07 04:46:49,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-11-07 04:46:49,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:46:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:46:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:46:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:46:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:46:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-11-07 04:46:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 04:46:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:46:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:46:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:46:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 04:46:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-11-07 04:46:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:46:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:46:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:46:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:46:50,270 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:46:50,270 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-07 04:46:50,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:50 BoogieIcfgContainer [2020-11-07 04:46:50,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:46:50,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:46:50,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:46:50,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:46:50,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:46:49" (1/3) ... [2020-11-07 04:46:50,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4540c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:50, skipping insertion in model container [2020-11-07 04:46:50,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:49" (2/3) ... [2020-11-07 04:46:50,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4540c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:50, skipping insertion in model container [2020-11-07 04:46:50,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:50" (3/3) ... [2020-11-07 04:46:50,284 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-11-07 04:46:50,300 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:46:50,305 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:46:50,318 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:46:50,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:46:50,353 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:46:50,353 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:46:50,353 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:46:50,353 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:46:50,353 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:46:50,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:46:50,354 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:46:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-11-07 04:46:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 04:46:50,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:50,397 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] [2020-11-07 04:46:50,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash 848677735, now seen corresponding path program 1 times [2020-11-07 04:46:50,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:50,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439464953] [2020-11-07 04:46:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:50,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:46:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:50,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 04:46:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:46:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439464953] [2020-11-07 04:46:50,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:46:50,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 04:46:50,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814447602] [2020-11-07 04:46:50,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 04:46:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:46:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 04:46:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 04:46:50,839 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 4 states. [2020-11-07 04:46:51,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:46:51,150 INFO L93 Difference]: Finished difference Result 169 states and 195 transitions. [2020-11-07 04:46:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 04:46:51,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-07 04:46:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:46:51,162 INFO L225 Difference]: With dead ends: 169 [2020-11-07 04:46:51,174 INFO L226 Difference]: Without dead ends: 85 [2020-11-07 04:46:51,179 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 [2020-11-07 04:46:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-07 04:46:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-11-07 04:46:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 04:46:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-11-07 04:46:51,234 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 35 [2020-11-07 04:46:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:46:51,235 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-11-07 04:46:51,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 04:46:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-11-07 04:46:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 04:46:51,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:51,238 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] [2020-11-07 04:46:51,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:46:51,238 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1830586856, now seen corresponding path program 1 times [2020-11-07 04:46:51,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:51,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576097831] [2020-11-07 04:46:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:51,304 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:51,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:51,425 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:46:51,425 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:46:51,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:46:51,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:46:51 BoogieIcfgContainer [2020-11-07 04:46:51,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:46:51,473 INFO L168 Benchmark]: Toolchain (without parser) took 2174.25 ms. Allocated memory was 151.0 MB in the beginning and 199.2 MB in the end (delta: 48.2 MB). Free memory was 127.4 MB in the beginning and 168.4 MB in the end (delta: -41.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:51,474 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:46:51,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:51,476 INFO L168 Benchmark]: Boogie Preprocessor took 50.98 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:51,477 INFO L168 Benchmark]: RCFGBuilder took 638.19 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 125.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:51,479 INFO L168 Benchmark]: TraceAbstraction took 1193.81 ms. Allocated memory was 151.0 MB in the beginning and 199.2 MB in the end (delta: 48.2 MB). Free memory was 124.5 MB in the beginning and 168.4 MB in the end (delta: -43.9 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:51,484 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 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.98 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 638.19 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 125.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1193.81 ms. Allocated memory was 151.0 MB in the beginning and 199.2 MB in the end (delta: 48.2 MB). Free memory was 124.5 MB in the beginning and 168.4 MB in the end (delta: -43.9 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 68, overapproximation of bitwiseAnd at line 22, overapproximation of someUnaryFLOAToperation at line 64, overapproximation of someBinaryArithmeticFLOAToperation at line 40. Possible FailurePath: [L64] float x = -0.0f; [L65] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967300] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967300, x=4294967300] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=4294967300, gf_u={3:0}, x=4294967300] [L18] gf_u.value = (x) VAL [\old(x)=4294967300, gf_u={3:0}, x=4294967300] [L19] EXPR gf_u.word VAL [\old(x)=4294967300, gf_u={3:0}, gf_u.word=0, x=4294967300] [L19] (w) = gf_u.word VAL [\old(x)=4294967300, gf_u={3:0}, gf_u.word=0, w=0, x=4294967300] [L21] signbit = w & 0x80000000 VAL [\old(x)=4294967300, signbit=8, w=0, x=4294967300] [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=4294967300, exponent_less_127=255, signbit=8, w=0, x=4294967300] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967300, exponent_less_127=255, signbit=8, w=0, x=4294967300] [L39] COND TRUE exponent_less_127 == 255 VAL [\old(x)=4294967300, exponent_less_127=255, signbit=8, w=0, x=4294967300] [L40] return x + x; VAL [\old(x)=4294967300, exponent_less_127=255, signbit=8, w=0, x=4294967300] [L65] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967298, x=4294967300] [L65] float res = trunc_float(x); VAL [res=4294967298, trunc_float(x)=4294967298, x=4294967300] [L68] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=4294967298, res == -0.0f && __signbit_float(res) == 1=0, x=4294967300] [L68] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [res=4294967298, res == -0.0f && __signbit_float(res) == 1=0, x=4294967300] [L69] CALL reach_error() [L4] __assert_fail("0", "float_req_bl_1072d.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 17 SDslu, 58 SDs, 0 SdLazy, 108 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=95occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2584 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...