/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:52:31,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:52:31,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:52:31,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:52:31,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:52:31,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:52:31,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:52:31,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:52:31,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:52:31,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:52:31,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:52:31,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:52:31,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:52:31,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:52:31,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:52:31,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:52:31,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:52:31,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:52:31,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:52:31,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:52:31,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:52:31,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:52:31,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:52:31,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:52:31,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 19:52:31,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:52:31,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:52:31,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:52:31,652 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 [2020-08-21 19:52:31,693 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:52:31,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:52:31,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:52:31,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:52:31,696 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:52:31,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:52:31,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:52:31,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:52:31,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:52:31,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:52:31,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:52:31,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:52:31,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:52:31,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:52:31,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:52:31,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:52:31,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:52:31,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:52:31,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:52:31,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:52:31,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:52:31,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:52:31,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:52:31,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:52:31,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:52:31,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:52:31,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:52:31,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:52:31,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:52:31,701 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=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:52:31,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:52:32,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:52:32,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:52:32,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:52:32,008 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:52:32,008 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2020-08-21 19:52:32,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb5f61070/73db10cd325f40abb1d4afeac3da5ff1/FLAG4438d2d9b [2020-08-21 19:52:32,488 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:52:32,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/array-2.c [2020-08-21 19:52:32,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb5f61070/73db10cd325f40abb1d4afeac3da5ff1/FLAG4438d2d9b [2020-08-21 19:52:32,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb5f61070/73db10cd325f40abb1d4afeac3da5ff1 [2020-08-21 19:52:32,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:52:32,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:52:32,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:52:32,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:52:32,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:52:32,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:52:32" (1/1) ... [2020-08-21 19:52:32,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:32, skipping insertion in model container [2020-08-21 19:52:32,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:52:32" (1/1) ... [2020-08-21 19:52:32,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:52:32,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:52:33,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:52:33,079 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:52:33,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:52:33,114 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:52:33,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33 WrapperNode [2020-08-21 19:52:33,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:52:33,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:52:33,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:52:33,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:52:33,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (1/1) ... [2020-08-21 19:52:33,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:52:33,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:52:33,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:52:33,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:52:33,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (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 [2020-08-21 19:52:33,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:52:33,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:52:33,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:52:33,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:52:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:52:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:52:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:52:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:52:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:52:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:52:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:52:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:52:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:52:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:52:33,579 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:52:33,579 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 19:52:33,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:33 BoogieIcfgContainer [2020-08-21 19:52:33,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:52:33,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:52:33,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:52:33,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:52:33,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:52:32" (1/3) ... [2020-08-21 19:52:33,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14db9335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:33, skipping insertion in model container [2020-08-21 19:52:33,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:33" (2/3) ... [2020-08-21 19:52:33,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14db9335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:33, skipping insertion in model container [2020-08-21 19:52:33,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:33" (3/3) ... [2020-08-21 19:52:33,610 INFO L109 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-08-21 19:52:33,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:52:33,637 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:52:33,650 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:52:33,673 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:52:33,673 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:52:33,673 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:52:33,673 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:52:33,674 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:52:33,674 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:52:33,674 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:52:33,674 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:52:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-21 19:52:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 19:52:33,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:33,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:33,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times [2020-08-21 19:52:33,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:33,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437461776] [2020-08-21 19:52:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:52:33,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437461776] [2020-08-21 19:52:33,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:33,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:52:33,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655061694] [2020-08-21 19:52:33,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:52:33,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:33,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:52:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:52:33,929 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-08-21 19:52:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:34,007 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-08-21 19:52:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:52:34,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 19:52:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:34,019 INFO L225 Difference]: With dead ends: 35 [2020-08-21 19:52:34,020 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 19:52:34,023 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 [2020-08-21 19:52:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 19:52:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 19:52:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 19:52:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-21 19:52:34,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-08-21 19:52:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:34,069 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-21 19:52:34,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:52:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-21 19:52:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 19:52:34,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:34,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:34,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:52:34,072 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times [2020-08-21 19:52:34,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:34,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31345035] [2020-08-21 19:52:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:34,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:52:34,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31345035] [2020-08-21 19:52:34,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:34,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:52:34,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000303972] [2020-08-21 19:52:34,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:52:34,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:52:34,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:52:34,262 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-08-21 19:52:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:34,365 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-08-21 19:52:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 19:52:34,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-08-21 19:52:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:34,368 INFO L225 Difference]: With dead ends: 24 [2020-08-21 19:52:34,368 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 19:52:34,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:52:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 19:52:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-08-21 19:52:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 19:52:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-21 19:52:34,375 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-08-21 19:52:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:34,376 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-21 19:52:34,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:52:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-21 19:52:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 19:52:34,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:34,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:34,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:52:34,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times [2020-08-21 19:52:34,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:34,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932047463] [2020-08-21 19:52:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:52:34,421 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:52:34,421 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:52:34,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:52:34,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:52:34 BoogieIcfgContainer [2020-08-21 19:52:34,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:52:34,447 INFO L168 Benchmark]: Toolchain (without parser) took 1573.41 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 125.5 MB in the end (delta: -23.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:34,448 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:52:34,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.29 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:34,450 INFO L168 Benchmark]: Boogie Preprocessor took 119.22 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 181.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:34,451 INFO L168 Benchmark]: RCFGBuilder took 349.00 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 167.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:34,452 INFO L168 Benchmark]: TraceAbstraction took 847.43 ms. Allocated memory is still 204.5 MB. Free memory was 167.2 MB in the beginning and 125.5 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:34,456 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.29 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.22 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 181.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.00 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 167.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 847.43 ms. Allocated memory is still 204.5 MB. Free memory was 167.2 MB in the beginning and 125.5 MB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int SIZE=1; [L14] unsigned int j,k; [L15] int array[SIZE], menor; [L17] menor = __VERIFIER_nondet_int() [L19] j=0 [L19] COND TRUE jmenor) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 11 SDslu, 13 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 561 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...