/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=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:01:35,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:01:35,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:01:35,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 22:01:35,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:01:35,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:01:35,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:01:35,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:01:35,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:01:35,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:01:35,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:01:35,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:01:35,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:01:35,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:01:35,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:01:35,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:01:35,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:01:35,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:01:35,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:01:35,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:01:35,878 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 22:01:35,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:01:35,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:01:35,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:01:35,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:01:35,932 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:01:35,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:01:35,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:01:35,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:01:35,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:01:35,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:01:35,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:01:35,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:01:35,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:01:35,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:01:35,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:01:35,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:01:35,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:01:35,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:01:35,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:01:35,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:01:35,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:01:35,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:01:35,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:01:35,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:01:35,944 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:01:36,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:01:36,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:01:36,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:01:36,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:01:36,285 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:01:36,286 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-18 22:01:36,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd53fd8/efd74189dbce4def9f4ecd54b9ad071c/FLAG4112e1fe8 [2020-08-18 22:01:36,877 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:01:36,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-18 22:01:36,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd53fd8/efd74189dbce4def9f4ecd54b9ad071c/FLAG4112e1fe8 [2020-08-18 22:01:37,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/06cd53fd8/efd74189dbce4def9f4ecd54b9ad071c [2020-08-18 22:01:37,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:01:37,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:01:37,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:37,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:01:37,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:01:37,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37, skipping insertion in model container [2020-08-18 22:01:37,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:01:37,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:01:37,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:37,524 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:01:37,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:37,559 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:01:37,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37 WrapperNode [2020-08-18 22:01:37,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:37,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:01:37,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:01:37,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:01:37,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:01:37,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:01:37,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:01:37,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:01:37,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (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 22:01:37,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:01:37,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:01:37,755 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:01:37,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:01:37,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:01:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:01:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:01:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:01:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:01:37,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:01:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:01:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:01:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:01:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:01:37,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:01:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:01:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:01:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:01:37,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:01:38,059 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:01:38,061 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:01:38,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:38 BoogieIcfgContainer [2020-08-18 22:01:38,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:01:38,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:01:38,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:01:38,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:01:38,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:01:37" (1/3) ... [2020-08-18 22:01:38,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d60ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:38, skipping insertion in model container [2020-08-18 22:01:38,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (2/3) ... [2020-08-18 22:01:38,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d60ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:38, skipping insertion in model container [2020-08-18 22:01:38,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:38" (3/3) ... [2020-08-18 22:01:38,081 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-08-18 22:01:38,092 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:01:38,099 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:01:38,113 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:01:38,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:01:38,138 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:01:38,139 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:01:38,139 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:01:38,139 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:01:38,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:01:38,139 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:01:38,139 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:01:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 22:01:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:01:38,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,166 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] [2020-08-18 22:01:38,167 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 22:01:38,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291999797] [2020-08-18 22:01:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,409 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 22:01:38,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291999797] [2020-08-18 22:01:38,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:38,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:01:38,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525203274] [2020-08-18 22:01:38,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:01:38,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:01:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:01:38,435 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 22:01:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:38,558 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 22:01:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:01:38,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:01:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:38,570 INFO L225 Difference]: With dead ends: 56 [2020-08-18 22:01:38,571 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:01:38,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:01:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:01:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 22:01:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:01:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 22:01:38,619 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-18 22:01:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:38,620 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 22:01:38,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:01:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 22:01:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:01:38,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,622 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] [2020-08-18 22:01:38,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:01:38,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 22:01:38,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701578682] [2020-08-18 22:01:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,748 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 22:01:38,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701578682] [2020-08-18 22:01:38,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:38,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:01:38,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131066155] [2020-08-18 22:01:38,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:01:38,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:01:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:01:38,754 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-18 22:01:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:38,892 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 22:01:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:01:38,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 22:01:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:38,894 INFO L225 Difference]: With dead ends: 45 [2020-08-18 22:01:38,894 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:01:38,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:01:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:01:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:01:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:01:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 22:01:38,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-18 22:01:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:38,906 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 22:01:38,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:01:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 22:01:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:01:38,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,907 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] [2020-08-18 22:01:38,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:01:38,908 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,908 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 22:01:38,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085316037] [2020-08-18 22:01:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:01:38,954 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:01:38,955 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:01:38,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:01:38,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:01:38 BoogieIcfgContainer [2020-08-18 22:01:38,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:01:38,982 INFO L168 Benchmark]: Toolchain (without parser) took 1721.63 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 106.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:38,983 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:01:38,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.77 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 89.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:38,985 INFO L168 Benchmark]: Boogie Preprocessor took 126.09 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 176.8 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:38,986 INFO L168 Benchmark]: RCFGBuilder took 379.72 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 159.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:38,987 INFO L168 Benchmark]: TraceAbstraction took 904.62 ms. Allocated memory is still 199.8 MB. Free memory was 159.6 MB in the beginning and 106.6 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:38,991 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.77 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 89.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.09 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 89.8 MB in the beginning and 176.8 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.72 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 159.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 904.62 ms. Allocated memory is still 199.8 MB. Free memory was 159.6 MB in the beginning and 106.6 MB in the end (delta: 53.0 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i