/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:32:32,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:32:32,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:32:32,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:32:32,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:32:32,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:32:32,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:32:32,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:32:32,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:32:32,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:32:32,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:32:32,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:32:32,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:32:32,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:32:32,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:32:32,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:32:32,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:32:32,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:32:32,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:32:32,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:32:32,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:32:32,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:32:32,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:32:32,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:32:32,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:32:32,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:32:32,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:32:32,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:32:32,732 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 18:32:32,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:32:32,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:32:32,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:32:32,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:32:32,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:32:32,751 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:32:32,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:32:32,751 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:32:32,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:32:32,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:32:32,752 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:32:32,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:32:32,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:32:32,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:32:32,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:32:32,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:32:32,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:32:32,754 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:32:33,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:32:33,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:32:33,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:32:33,065 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:32:33,065 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:32:33,066 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-22 18:32:33,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13dd6e50/aeed881a16fc410b9c873829ec5e2a8a/FLAG32efb681e [2020-08-22 18:32:33,611 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:32:33,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-22 18:32:33,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13dd6e50/aeed881a16fc410b9c873829ec5e2a8a/FLAG32efb681e [2020-08-22 18:32:33,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13dd6e50/aeed881a16fc410b9c873829ec5e2a8a [2020-08-22 18:32:33,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:32:33,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:32:33,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:32:33,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:32:33,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:32:33,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:33" (1/1) ... [2020-08-22 18:32:33,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fd6845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:33, skipping insertion in model container [2020-08-22 18:32:33,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:33" (1/1) ... [2020-08-22 18:32:33,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:32:34,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:32:34,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:32:34,213 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:32:34,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:32:34,357 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:32:34,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34 WrapperNode [2020-08-22 18:32:34,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:32:34,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:32:34,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:32:34,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:32:34,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (1/1) ... [2020-08-22 18:32:34,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:32:34,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:32:34,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:32:34,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:32:34,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (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 18:32:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:32:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:32:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-22 18:32:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-08-22 18:32:34,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 18:32:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:32:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:32:34,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-22 18:32:34,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:32:34,992 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:32:34,992 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-22 18:32:34,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:32:34 BoogieIcfgContainer [2020-08-22 18:32:34,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:32:35,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:32:35,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:32:35,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:32:35,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:32:33" (1/3) ... [2020-08-22 18:32:35,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d6510a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:32:35, skipping insertion in model container [2020-08-22 18:32:35,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:34" (2/3) ... [2020-08-22 18:32:35,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d6510a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:32:35, skipping insertion in model container [2020-08-22 18:32:35,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:32:34" (3/3) ... [2020-08-22 18:32:35,007 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-08-22 18:32:35,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:32:35,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:32:35,039 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:32:35,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:32:35,061 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:32:35,061 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:32:35,061 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:32:35,061 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:32:35,061 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:32:35,061 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:32:35,061 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:32:35,079 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states. [2020-08-22 18:32:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 18:32:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:32:35,093 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] [2020-08-22 18:32:35,094 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:32:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:32:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash -309473205, now seen corresponding path program 1 times [2020-08-22 18:32:35,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:32:35,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489561576] [2020-08-22 18:32:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:32:35,160 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:32:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:32:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:35,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 18:32:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 18:32:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:35,368 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 18:32:35,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489561576] [2020-08-22 18:32:35,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:32:35,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:32:35,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456088965] [2020-08-22 18:32:35,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:32:35,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:32:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:32:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:32:35,396 INFO L87 Difference]: Start difference. First operand 162 states. Second operand 4 states. [2020-08-22 18:32:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:32:35,828 INFO L93 Difference]: Finished difference Result 306 states and 369 transitions. [2020-08-22 18:32:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:32:35,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-08-22 18:32:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:32:35,843 INFO L225 Difference]: With dead ends: 306 [2020-08-22 18:32:35,844 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 18:32:35,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 18:32:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 18:32:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-08-22 18:32:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 18:32:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2020-08-22 18:32:35,910 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 49 [2020-08-22 18:32:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:32:35,911 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2020-08-22 18:32:35,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:32:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2020-08-22 18:32:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 18:32:35,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:32:35,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:32:35,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:32:35,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:32:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:32:35,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1032631156, now seen corresponding path program 1 times [2020-08-22 18:32:35,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:32:35,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669073714] [2020-08-22 18:32:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:32:35,919 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:32:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:32:36,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:32:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:32:36,122 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:32:36,176 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:32:36,176 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:32:36,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:32:36,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:32:36 BoogieIcfgContainer [2020-08-22 18:32:36,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:32:36,225 INFO L168 Benchmark]: Toolchain (without parser) took 2266.86 ms. Allocated memory was 140.5 MB in the beginning and 235.4 MB in the end (delta: 94.9 MB). Free memory was 104.8 MB in the beginning and 162.8 MB in the end (delta: -58.1 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,226 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.94 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 104.6 MB in the beginning and 181.1 MB in the end (delta: -76.6 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,228 INFO L168 Benchmark]: Boogie Preprocessor took 69.83 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 179.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,231 INFO L168 Benchmark]: RCFGBuilder took 570.34 ms. Allocated memory is still 204.5 MB. Free memory was 178.5 MB in the beginning and 142.3 MB in the end (delta: 36.2 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,232 INFO L168 Benchmark]: TraceAbstraction took 1221.81 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 141.7 MB in the beginning and 162.8 MB in the end (delta: -21.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:36,239 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 398.94 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 104.6 MB in the beginning and 181.1 MB in the end (delta: -76.6 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.83 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 179.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 570.34 ms. Allocated memory is still 204.5 MB. Free memory was 178.5 MB in the beginning and 142.3 MB in the end (delta: 36.2 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1221.81 ms. Allocated memory was 204.5 MB in the beginning and 235.4 MB in the end (delta: 30.9 MB). Free memory was 141.7 MB in the beginning and 162.8 MB in the end (delta: -21.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 32, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; [L129] CALL isfinite_float(x) [L109] __int32_t ix; [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); [L129] RET isfinite_float(x) [L129] COND TRUE isfinite_float(x) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] COND TRUE res != x [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 162 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 31 SDslu, 128 SDs, 0 SdLazy, 190 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...