/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:53:26,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:53:26,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:53:26,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:53:26,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:53:26,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:53:26,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:53:26,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:53:26,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:53:26,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:53:26,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:53:26,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:53:26,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:53:26,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:53:26,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:53:26,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:53:26,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:53:26,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:53:26,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:53:26,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:53:26,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:53:26,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:53:26,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:53:26,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:53:26,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:53:26,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:53:26,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:53:26,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:53:26,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:53:26,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:53:26,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:53:26,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:53:26,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:53:26,710 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:53:26,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:53:26,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:53:26,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:53:26,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:53:26,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:53:26,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:53:26,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:53:26,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:53:26,713 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:53:26,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:53:26,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:53:26,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:53:26,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:53:26,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:53:26,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:53:26,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:53:26,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:53:26,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:53:26,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:53:26,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:53:26,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:53:27,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:53:27,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:53:27,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:53:27,017 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:53:27,017 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2020-08-18 12:53:27,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/170042edb/29c1bd696a294e67b55d57095f1993d2/FLAG6fced9f8e [2020-08-18 12:53:27,431 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:53:27,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2020-08-18 12:53:27,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/170042edb/29c1bd696a294e67b55d57095f1993d2/FLAG6fced9f8e [2020-08-18 12:53:27,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/170042edb/29c1bd696a294e67b55d57095f1993d2 [2020-08-18 12:53:27,823 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:53:27,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:53:27,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:53:27,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:53:27,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:53:27,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:53:27" (1/1) ... [2020-08-18 12:53:27,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101a8ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:27, skipping insertion in model container [2020-08-18 12:53:27,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:53:27" (1/1) ... [2020-08-18 12:53:27,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:53:27,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:53:28,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:53:28,080 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:53:28,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:53:28,123 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:53:28,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28 WrapperNode [2020-08-18 12:53:28,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:53:28,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:53:28,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:53:28,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:53:28,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... [2020-08-18 12:53:28,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:53:28,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:53:28,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:53:28,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:53:28,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 12:53:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 12:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 12:53:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:53:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:53:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:53:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:53:28,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:53:28,600 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:53:28,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:53:28 BoogieIcfgContainer [2020-08-18 12:53:28,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:53:28,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:53:28,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:53:28,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:53:28,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:53:27" (1/3) ... [2020-08-18 12:53:28,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c54a10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:53:28, skipping insertion in model container [2020-08-18 12:53:28,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:53:28" (2/3) ... [2020-08-18 12:53:28,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c54a10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:53:28, skipping insertion in model container [2020-08-18 12:53:28,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:53:28" (3/3) ... [2020-08-18 12:53:28,633 INFO L109 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-08-18 12:53:28,666 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:53:28,681 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:53:28,707 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:53:28,735 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:53:28,735 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:53:28,735 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:53:28,735 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:53:28,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:53:28,736 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:53:28,736 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:53:28,736 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:53:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-18 12:53:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 12:53:28,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:53:28,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:53:28,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:53:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:53:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 309552683, now seen corresponding path program 1 times [2020-08-18 12:53:28,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:53:28,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506670629] [2020-08-18 12:53:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:53:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:53:28,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:53:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:53:28,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:53:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:53:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:53:28,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506670629] [2020-08-18 12:53:28,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:53:28,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 12:53:28,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520024655] [2020-08-18 12:53:28,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 12:53:28,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:53:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 12:53:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 12:53:28,955 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-08-18 12:53:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:53:28,982 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-08-18 12:53:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 12:53:28,984 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-18 12:53:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:53:28,992 INFO L225 Difference]: With dead ends: 38 [2020-08-18 12:53:28,993 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 12:53:28,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 12:53:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 12:53:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 12:53:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 12:53:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-08-18 12:53:29,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15 [2020-08-18 12:53:29,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:53:29,042 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-08-18 12:53:29,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 12:53:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-08-18 12:53:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 12:53:29,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:53:29,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:53:29,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:53:29,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:53:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:53:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash -499793943, now seen corresponding path program 1 times [2020-08-18 12:53:29,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:53:29,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198813587] [2020-08-18 12:53:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:53:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:53:29,072 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:53:29,072 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:53:29,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:53:29,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:53:29 BoogieIcfgContainer [2020-08-18 12:53:29,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:53:29,093 INFO L168 Benchmark]: Toolchain (without parser) took 1267.02 ms. Allocated memory was 142.1 MB in the beginning and 207.1 MB in the end (delta: 65.0 MB). Free memory was 105.8 MB in the beginning and 152.5 MB in the end (delta: -46.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:53:29,094 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:53:29,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.36 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 96.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:53:29,096 INFO L168 Benchmark]: Boogie Preprocessor took 38.82 ms. Allocated memory is still 142.1 MB. Free memory was 96.1 MB in the beginning and 94.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:53:29,097 INFO L168 Benchmark]: RCFGBuilder took 442.26 ms. Allocated memory was 142.1 MB in the beginning and 207.1 MB in the end (delta: 65.0 MB). Free memory was 94.5 MB in the beginning and 174.8 MB in the end (delta: -80.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:53:29,098 INFO L168 Benchmark]: TraceAbstraction took 478.09 ms. Allocated memory is still 207.1 MB. Free memory was 174.1 MB in the beginning and 153.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-18 12:53:29,102 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.36 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 96.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.82 ms. Allocated memory is still 142.1 MB. Free memory was 96.1 MB in the beginning and 94.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.26 ms. Allocated memory was 142.1 MB in the beginning and 207.1 MB in the end (delta: 65.0 MB). Free memory was 94.5 MB in the beginning and 174.8 MB in the end (delta: -80.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 478.09 ms. Allocated memory is still 207.1 MB. Free memory was 174.1 MB in the beginning and 153.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 19. Possible FailurePath: [L13] int x; [L14] float y, z; [L16] x = __VERIFIER_nondet_int() [L17] CALL assume_abort_if_not(x >= -10 && x <= 10) [L7] COND FALSE !(!cond) [L17] RET assume_abort_if_not(x >= -10 && x <= 10) [L19] y = x*x - 4.f [L20] CALL __VERIFIER_assert(y != 0.f) [L9] COND TRUE !(cond) [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 0.0s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 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...