/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s52iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:58:16,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:58:16,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:58:16,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:58:16,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:58:16,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:58:16,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:58:16,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:58:16,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:58:16,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:58:16,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:58:16,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:58:16,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:58:16,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:58:16,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:58:16,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:58:16,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:58:16,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:58:16,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:58:16,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:58:16,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:58:16,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:58:16,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:58:16,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:58:16,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:58:16,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:58:16,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:58:16,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:58:16,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:58:16,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:58:16,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:58:16,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:58:16,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:58:16,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:58:16,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:58:16,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:58:16,474 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 [2020-08-27 21:58:16,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:58:16,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:58:16,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:58:16,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:58:16,522 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:58:16,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:58:16,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:58:16,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:58:16,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:58:16,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:58:16,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:58:16,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:58:16,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:58:16,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:58:16,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:58:16,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:58:16,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:58:16,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:58:16,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:58:16,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:58:16,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:58:16,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:58:16,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:58:16,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:58:16,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:58:16,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:58:16,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:58:16,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:58:16,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:58:16,528 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 -> false [2020-08-27 21:58:16,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:58:16,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:58:17,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:58:17,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:58:17,002 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:58:17,003 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s52iff.c [2020-08-27 21:58:17,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b69595c/238d3d11f2a04802844caa223254c0e1/FLAG3541fea64 [2020-08-27 21:58:17,669 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:58:17,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s52iff.c [2020-08-27 21:58:17,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b69595c/238d3d11f2a04802844caa223254c0e1/FLAG3541fea64 [2020-08-27 21:58:17,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b69595c/238d3d11f2a04802844caa223254c0e1 [2020-08-27 21:58:17,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:58:17,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:58:17,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:58:17,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:58:18,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:58:18,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:58:17" (1/1) ... [2020-08-27 21:58:18,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c54ab82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18, skipping insertion in model container [2020-08-27 21:58:18,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:58:17" (1/1) ... [2020-08-27 21:58:18,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:58:18,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:58:18,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:58:18,293 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:58:18,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:58:18,432 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:58:18,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18 WrapperNode [2020-08-27 21:58:18,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:58:18,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:58:18,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:58:18,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:58:18,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (1/1) ... [2020-08-27 21:58:18,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:58:18,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:58:18,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:58:18,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:58:18,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (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 [2020-08-27 21:58:18,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:58:18,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:58:18,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-27 21:58:18,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:58:18,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-27 21:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:58:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:58:18,947 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:58:18,947 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-27 21:58:18,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:58:18 BoogieIcfgContainer [2020-08-27 21:58:18,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:58:18,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:58:18,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:58:18,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:58:18,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:58:17" (1/3) ... [2020-08-27 21:58:18,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e834c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:58:18, skipping insertion in model container [2020-08-27 21:58:18,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:58:18" (2/3) ... [2020-08-27 21:58:18,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e834c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:58:18, skipping insertion in model container [2020-08-27 21:58:18,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:58:18" (3/3) ... [2020-08-27 21:58:18,963 INFO L109 eAbstractionObserver]: Analyzing ICFG s52iff.c [2020-08-27 21:58:18,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:58:18,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:58:19,002 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:58:19,030 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:58:19,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:58:19,030 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:58:19,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:58:19,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:58:19,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:58:19,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:58:19,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:58:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-27 21:58:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:58:19,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:19,063 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] [2020-08-27 21:58:19,063 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-08-27 21:58:19,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:19,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421554126] [2020-08-27 21:58:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:58:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:19,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421554126] [2020-08-27 21:58:19,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:58:19,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:58:19,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602285498] [2020-08-27 21:58:19,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:58:19,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:58:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:58:19,340 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-27 21:58:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:19,505 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-27 21:58:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:58:19,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-27 21:58:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:19,519 INFO L225 Difference]: With dead ends: 62 [2020-08-27 21:58:19,520 INFO L226 Difference]: Without dead ends: 29 [2020-08-27 21:58:19,524 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 [2020-08-27 21:58:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-27 21:58:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-27 21:58:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-27 21:58:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-27 21:58:19,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-08-27 21:58:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:19,580 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-27 21:58:19,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:58:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-27 21:58:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-27 21:58:19,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:19,582 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] [2020-08-27 21:58:19,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:58:19,583 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-08-27 21:58:19,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:19,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169046044] [2020-08-27 21:58:19,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:58:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:58:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:58:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:58:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169046044] [2020-08-27 21:58:19,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:58:19,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:58:19,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260203719] [2020-08-27 21:58:19,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:58:19,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:58:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:58:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:58:19,754 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-08-27 21:58:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:58:19,902 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-27 21:58:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:58:19,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-27 21:58:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:58:19,904 INFO L225 Difference]: With dead ends: 51 [2020-08-27 21:58:19,904 INFO L226 Difference]: Without dead ends: 37 [2020-08-27 21:58:19,906 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 [2020-08-27 21:58:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-27 21:58:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-27 21:58:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-27 21:58:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-27 21:58:19,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-08-27 21:58:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:58:19,916 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-27 21:58:19,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:58:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-27 21:58:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:58:19,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:58:19,918 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] [2020-08-27 21:58:19,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:58:19,918 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:58:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:58:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-08-27 21:58:19,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:58:19,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655140361] [2020-08-27 21:58:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:58:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:58:19,979 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:58:19,980 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:58:19,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:58:20,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:58:20 BoogieIcfgContainer [2020-08-27 21:58:20,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:58:20,008 INFO L168 Benchmark]: Toolchain (without parser) took 2011.99 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.4 MB in the beginning and 104.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,009 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,011 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.50 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 183.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,011 INFO L168 Benchmark]: Boogie Preprocessor took 51.89 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,012 INFO L168 Benchmark]: RCFGBuilder took 465.59 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 162.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,013 INFO L168 Benchmark]: TraceAbstraction took 1050.70 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:58:20,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.50 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 183.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.89 ms. Allocated memory is still 203.9 MB. Free memory was 182.3 MB in the beginning and 180.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 465.59 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 162.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1050.70 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 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] sum[0] = 1 [L30] i=0 [L30] COND TRUE i