/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:37:11,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:37:11,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:37:11,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:37:11,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:37:11,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:37:11,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:37:11,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:37:11,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:37:11,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:37:11,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:37:11,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:37:11,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:37:11,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:37:11,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:37:11,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:37:11,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:37:11,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:37:11,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:37:11,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:37:11,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:37:11,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:37:11,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:37:11,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:37:11,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:37:11,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:37:11,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:37:11,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:37:11,545 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 19:37:11,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:37:11,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:37:11,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:37:11,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:37:11,576 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:37:11,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:37:11,576 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:37:11,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:37:11,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:37:11,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:37:11,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:37:11,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:37:11,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:37:11,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:37:11,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:37:11,578 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:37:11,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:37:11,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:37:11,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:37:11,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:37:11,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:37:11,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:37:11,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:37:11,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:37:11,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:37:11,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:37:11,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:37:11,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:37:11,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:37:11,581 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:37:11,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:37:11,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:37:11,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:37:11,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:37:11,933 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:37:11,934 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-08-18 19:37:12,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a44e4b585/9d3c70d96921480bb44d4b0bb8b7857d/FLAG0fe2c1d21 [2020-08-18 19:37:12,519 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:37:12,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum_array-1.c [2020-08-18 19:37:12,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a44e4b585/9d3c70d96921480bb44d4b0bb8b7857d/FLAG0fe2c1d21 [2020-08-18 19:37:12,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a44e4b585/9d3c70d96921480bb44d4b0bb8b7857d [2020-08-18 19:37:12,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:37:12,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:37:12,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:12,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:37:12,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:37:12,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:12" (1/1) ... [2020-08-18 19:37:12,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f0616b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:12, skipping insertion in model container [2020-08-18 19:37:12,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:12" (1/1) ... [2020-08-18 19:37:12,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:37:12,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:37:13,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:13,132 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:37:13,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:13,267 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:37:13,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13 WrapperNode [2020-08-18 19:37:13,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:13,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:37:13,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:37:13,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:37:13,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (1/1) ... [2020-08-18 19:37:13,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:37:13,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:37:13,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:37:13,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:37:13,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (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 19:37:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:37:13,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:37:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 19:37:13,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:37:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:37:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:37:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 19:37:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 19:37:13,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:37:13,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:37:13,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:37:13,674 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 19:37:13,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:13 BoogieIcfgContainer [2020-08-18 19:37:13,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:37:13,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:37:13,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:37:13,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:37:13,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:37:12" (1/3) ... [2020-08-18 19:37:13,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76954cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:13, skipping insertion in model container [2020-08-18 19:37:13,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:13" (2/3) ... [2020-08-18 19:37:13,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76954cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:13, skipping insertion in model container [2020-08-18 19:37:13,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:13" (3/3) ... [2020-08-18 19:37:13,689 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-08-18 19:37:13,711 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:37:13,722 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:37:13,752 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:37:13,772 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:37:13,772 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:37:13,772 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:37:13,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:37:13,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:37:13,772 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:37:13,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:37:13,772 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:37:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-18 19:37:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 19:37:13,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:13,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:13,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2020-08-18 19:37:13,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:13,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703297212] [2020-08-18 19:37:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:14,009 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 19:37:14,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703297212] [2020-08-18 19:37:14,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:14,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:37:14,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083917893] [2020-08-18 19:37:14,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:37:14,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:37:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:37:14,037 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-08-18 19:37:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:14,164 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-08-18 19:37:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:37:14,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 19:37:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:14,176 INFO L225 Difference]: With dead ends: 52 [2020-08-18 19:37:14,176 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 19:37:14,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:37:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 19:37:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-18 19:37:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 19:37:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-18 19:37:14,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-08-18 19:37:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:14,222 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-18 19:37:14,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:37:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-18 19:37:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 19:37:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:14,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:14,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:37:14,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2020-08-18 19:37:14,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:14,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931911992] [2020-08-18 19:37:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:14,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:14,403 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 19:37:14,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931911992] [2020-08-18 19:37:14,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:14,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:37:14,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470330887] [2020-08-18 19:37:14,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:37:14,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:14,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:37:14,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:37:14,408 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-08-18 19:37:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:14,569 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-08-18 19:37:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:37:14,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-18 19:37:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:14,573 INFO L225 Difference]: With dead ends: 57 [2020-08-18 19:37:14,573 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 19:37:14,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:37:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 19:37:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-08-18 19:37:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 19:37:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 19:37:14,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-08-18 19:37:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:14,588 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 19:37:14,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:37:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 19:37:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:37:14,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:14,590 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] [2020-08-18 19:37:14,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:37:14,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2020-08-18 19:37:14,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:14,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720574307] [2020-08-18 19:37:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:37:14,692 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:37:14,692 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:37:14,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:37:14,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:37:14 BoogieIcfgContainer [2020-08-18 19:37:14,717 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:37:14,720 INFO L168 Benchmark]: Toolchain (without parser) took 1820.47 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 102.2 MB in the beginning and 102.7 MB in the end (delta: -495.1 kB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,722 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.39 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 180.2 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,724 INFO L168 Benchmark]: Boogie Preprocessor took 38.71 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 177.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,725 INFO L168 Benchmark]: RCFGBuilder took 370.69 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 160.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,726 INFO L168 Benchmark]: TraceAbstraction took 1037.29 ms. Allocated memory is still 201.3 MB. Free memory was 160.1 MB in the beginning and 102.7 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:14,730 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.39 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 180.2 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.71 ms. Allocated memory is still 201.3 MB. Free memory was 180.2 MB in the beginning and 177.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.69 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 160.7 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1037.29 ms. Allocated memory is still 201.3 MB. Free memory was 160.1 MB in the beginning and 102.7 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] unsigned int M = __VERIFIER_nondet_uint(); [L15] int A[M], B[M], C[M]; [L16] unsigned int i; [L18] i=0 [L18] COND TRUE i