/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:50:49,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:50:49,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:50:49,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:50:49,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:50:49,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:50:49,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:50:49,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:50:49,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:50:49,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:50:49,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:50:49,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:50:49,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:50:49,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:50:49,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:50:49,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:50:49,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:50:49,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:50:49,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:50:49,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:50:49,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:50:49,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:50:49,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:50:49,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:50:49,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:50:49,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:50:49,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:50:49,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:50:49,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:50:49,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:50:49,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:50:49,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:50:49,747 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:50:49,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:50:49,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:50:49,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:50:49,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:50:49,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:50:49,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:50:49,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:50:49,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:50:49,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:50:49,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:50:49,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:50:49,749 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:50:49,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:50:49,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:50:49,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:50:49,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:50:49,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:50:49,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:50:49,750 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 21:50:50,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:50:50,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:50:50,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:50:50,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:50:50,062 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:50:50,062 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-08-22 21:50:50,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b342a66c0/3c4e5a9a62734791ba10729748ae1b3b/FLAG2f161ed56 [2020-08-22 21:50:50,580 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:50:50,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-08-22 21:50:50,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b342a66c0/3c4e5a9a62734791ba10729748ae1b3b/FLAG2f161ed56 [2020-08-22 21:50:51,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b342a66c0/3c4e5a9a62734791ba10729748ae1b3b [2020-08-22 21:50:51,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:50:51,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:50:51,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:51,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:50:51,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:50:51,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb2e3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51, skipping insertion in model container [2020-08-22 21:50:51,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:50:51,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:50:51,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:51,248 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:50:51,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:51,289 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:50:51,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51 WrapperNode [2020-08-22 21:50:51,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:51,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:50:51,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:50:51,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:50:51,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (1/1) ... [2020-08-22 21:50:51,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:50:51,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:50:51,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:50:51,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:50:51,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (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 [2020-08-22 21:50:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:50:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:50:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2020-08-22 21:50:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-22 21:50:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:50:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:50:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 21:50:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2020-08-22 21:50:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:50:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:50:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:50:51,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:50:51,779 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 21:50:51,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:51 BoogieIcfgContainer [2020-08-22 21:50:51,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:50:51,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:50:51,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:50:51,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:50:51,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:50:51" (1/3) ... [2020-08-22 21:50:51,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e8967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:51, skipping insertion in model container [2020-08-22 21:50:51,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:51" (2/3) ... [2020-08-22 21:50:51,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3e8967 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:51, skipping insertion in model container [2020-08-22 21:50:51,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:51" (3/3) ... [2020-08-22 21:50:51,793 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2020-08-22 21:50:51,807 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:50:51,813 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:50:51,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:50:51,851 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:50:51,851 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:50:51,851 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:50:51,852 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:50:51,852 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:50:51,852 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:50:51,852 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:50:51,852 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:50:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-08-22 21:50:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 21:50:51,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:51,883 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] [2020-08-22 21:50:51,883 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 658521785, now seen corresponding path program 1 times [2020-08-22 21:50:51,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:51,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523998162] [2020-08-22 21:50:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:50:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:52,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 21:50:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:52,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 21:50:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 21:50:52,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523998162] [2020-08-22 21:50:52,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:50:52,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:50:52,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179348032] [2020-08-22 21:50:52,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:50:52,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:50:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:50:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:50:52,158 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 4 states. [2020-08-22 21:50:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:50:52,404 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-08-22 21:50:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:50:52,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-22 21:50:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:50:52,418 INFO L225 Difference]: With dead ends: 118 [2020-08-22 21:50:52,418 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 21:50:52,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:50:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 21:50:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 21:50:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 21:50:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 59 transitions. [2020-08-22 21:50:52,473 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 59 transitions. Word has length 32 [2020-08-22 21:50:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:50:52,473 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 59 transitions. [2020-08-22 21:50:52,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:50:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 59 transitions. [2020-08-22 21:50:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 21:50:52,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:52,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:50:52,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:50:52,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash 418826666, now seen corresponding path program 1 times [2020-08-22 21:50:52,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:52,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959663021] [2020-08-22 21:50:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:52,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:52,631 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:52,684 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:50:52,685 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:50:52,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:50:52,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:50:52 BoogieIcfgContainer [2020-08-22 21:50:52,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:50:52,729 INFO L168 Benchmark]: Toolchain (without parser) took 1704.91 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 107.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,730 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.44 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,732 INFO L168 Benchmark]: Boogie Preprocessor took 144.77 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 179.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,733 INFO L168 Benchmark]: RCFGBuilder took 349.68 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 158.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,734 INFO L168 Benchmark]: TraceAbstraction took 939.63 ms. Allocated memory is still 202.4 MB. Free memory was 158.2 MB in the beginning and 107.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:52,739 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.44 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.77 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 91.9 MB in the beginning and 179.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.68 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 158.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 939.63 ms. Allocated memory is still 202.4 MB. Free memory was 158.2 MB in the beginning and 107.3 MB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 49]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 33, overapproximation of bitwiseOr at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L43] float x = 0.0f / 0.0f; [L44] float y = __VERIFIER_nondet_float(); VAL [__VERIFIER_nondet_float()=16, y=16] [L45] CALL, EXPR copysign_float(x, y) VAL [\old(x)=18, \old(y)=16] [L13] __uint32_t ix, iy; VAL [\old(x)=18, \old(y)=16, x=18, y=16] [L15] ieee_float_shape_type gf_u; VAL [\old(x)=18, \old(y)=16, gf_u={3:0}, x=18, y=16] [L16] gf_u.value = (x) VAL [\old(x)=18, \old(y)=16, gf_u={3:0}, x=18, y=16] [L17] EXPR gf_u.word VAL [\old(x)=18, \old(y)=16, gf_u={3:0}, gf_u.word=17, x=18, y=16] [L17] (ix) = gf_u.word VAL [(ix) = gf_u.word=8, \old(x)=18, \old(y)=16, gf_u={3:0}, gf_u.word=17, ix=17, x=18, y=16] [L20] ieee_float_shape_type gf_u; VAL [\old(x)=18, \old(y)=16, gf_u={5:0}, ix=17, x=18, y=16] [L21] gf_u.value = (y) VAL [\old(x)=18, \old(y)=16, gf_u={5:0}, ix=17, x=18, y=16] [L22] EXPR gf_u.word VAL [\old(x)=18, \old(y)=16, gf_u={5:0}, gf_u.word=15, ix=17, x=18, y=16] [L22] (iy) = gf_u.word VAL [(iy) = gf_u.word=12, \old(x)=18, \old(y)=16, gf_u={5:0}, gf_u.word=15, ix=17, iy=15, x=18, y=16] [L25] ieee_float_shape_type sf_u; VAL [\old(x)=18, \old(y)=16, ix=17, iy=15, sf_u={2:0}, x=18, y=16] [L26] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) VAL [\old(x)=18, \old(y)=16, ix=17, iy=15, sf_u={2:0}, x=18, y=16] [L27] EXPR sf_u.value VAL [\old(x)=18, \old(y)=16, ix=17, iy=15, sf_u={2:0}, sf_u.value=11, x=18, y=16] [L27] (x) = sf_u.value VAL [(x) = sf_u.value=19, \old(x)=18, \old(y)=16, ix=17, iy=15, sf_u={2:0}, sf_u.value=11, x=11, y=16] [L29] return x; VAL [\old(x)=18, \old(y)=16, \result=11, ix=17, iy=15, x=11, y=16] [L45] RET, EXPR copysign_float(x, y) VAL [copysign_float(x, y)=11, x=18, y=16] [L45] float res = copysign_float(x, y); VAL [copysign_float(x, y)=11, res=11, x=18, y=16] [L48] CALL, EXPR isnan_float(res) VAL [\old(x)=11] [L33] return x != x; VAL [\old(x)=11, \result=0, x=11] [L48] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=11, x=18, y=16] [L48] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=11, x=18, y=16] [L49] __VERIFIER_error() VAL [res=11, x=18, y=16] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 67 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: 63 SDtfs, 21 SDslu, 35 SDs, 0 SdLazy, 68 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred 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, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 1612 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...