/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:18,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:18,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:18,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:18,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:18,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:18,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:18,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:18,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:18,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:18,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:18,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:18,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:18,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:18,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:18,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:18,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:18,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:18,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:18,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:18,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:18,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:18,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:18,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:18,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:18,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:18,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:18,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:18,619 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 16:23:18,663 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:18,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:18,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:18,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:18,665 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:18,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:18,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:18,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:18,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:18,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:18,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:18,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:18,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:18,668 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:18,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:18,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:18,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:18,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:18,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:18,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:18,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:18,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:18,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:18,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:18,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:18,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:18,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:18,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:18,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:18,671 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 [2020-08-18 16:23:18,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:18,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:18,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:18,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:18,983 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:18,984 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-08-18 16:23:19,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/106a2c2f0/4622e54061a449bdaf0431eaf7a1f49e/FLAG31d6e1178 [2020-08-18 16:23:19,581 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:19,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condgf.c [2020-08-18 16:23:19,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/106a2c2f0/4622e54061a449bdaf0431eaf7a1f49e/FLAG31d6e1178 [2020-08-18 16:23:19,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/106a2c2f0/4622e54061a449bdaf0431eaf7a1f49e [2020-08-18 16:23:19,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:19,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:19,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:19,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:19,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:19,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:19" (1/1) ... [2020-08-18 16:23:19,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:19, skipping insertion in model container [2020-08-18 16:23:19,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:19" (1/1) ... [2020-08-18 16:23:19,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:19,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:20,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:20,150 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:20,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:20,190 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:20,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20 WrapperNode [2020-08-18 16:23:20,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:20,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:20,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:20,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:20,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (1/1) ... [2020-08-18 16:23:20,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:20,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:20,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:20,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:20,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (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 16:23:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:23:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:20,690 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:20,691 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 16:23:20,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:20 BoogieIcfgContainer [2020-08-18 16:23:20,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:20,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:20,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:20,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:20,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:19" (1/3) ... [2020-08-18 16:23:20,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4054f18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:20, skipping insertion in model container [2020-08-18 16:23:20,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:20" (2/3) ... [2020-08-18 16:23:20,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4054f18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:20, skipping insertion in model container [2020-08-18 16:23:20,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:20" (3/3) ... [2020-08-18 16:23:20,708 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-08-18 16:23:20,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:20,731 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:20,747 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:20,774 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:20,775 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:20,775 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:20,775 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:20,775 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:20,775 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:20,775 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:20,776 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 16:23:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:23:20,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:20,806 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] [2020-08-18 16:23:20,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-08-18 16:23:20,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:20,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387358804] [2020-08-18 16:23:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,033 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 16:23:21,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387358804] [2020-08-18 16:23:21,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:21,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:23:21,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796864110] [2020-08-18 16:23:21,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:23:21,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:23:21,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:21,068 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-18 16:23:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:21,188 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-08-18 16:23:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:23:21,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:23:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:21,200 INFO L225 Difference]: With dead ends: 66 [2020-08-18 16:23:21,200 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 16:23:21,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 16:23:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 16:23:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 16:23:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-18 16:23:21,248 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-18 16:23:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:21,248 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-18 16:23:21,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:23:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-18 16:23:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:23:21,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:21,250 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] [2020-08-18 16:23:21,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:21,251 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-08-18 16:23:21,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:21,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233508450] [2020-08-18 16:23:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,388 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 16:23:21,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233508450] [2020-08-18 16:23:21,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:21,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:23:21,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377501200] [2020-08-18 16:23:21,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:23:21,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:23:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:21,393 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-08-18 16:23:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:21,580 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-08-18 16:23:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:23:21,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-18 16:23:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:21,584 INFO L225 Difference]: With dead ends: 62 [2020-08-18 16:23:21,584 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 16:23:21,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:23:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 16:23:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-18 16:23:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 16:23:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-18 16:23:21,601 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-08-18 16:23:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:21,601 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-18 16:23:21,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:23:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-18 16:23:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:23:21,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:21,603 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] [2020-08-18 16:23:21,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:21,604 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-08-18 16:23:21,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:21,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538094997] [2020-08-18 16:23:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538094997] [2020-08-18 16:23:21,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:23:21,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 16:23:21,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911636026] [2020-08-18 16:23:21,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 16:23:21,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 16:23:21,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-18 16:23:21,971 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-08-18 16:23:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:22,429 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-08-18 16:23:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 16:23:22,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-08-18 16:23:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:22,432 INFO L225 Difference]: With dead ends: 59 [2020-08-18 16:23:22,432 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 16:23:22,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 16:23:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 16:23:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 16:23:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 16:23:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-18 16:23:22,442 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-08-18 16:23:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:22,443 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-18 16:23:22,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 16:23:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-18 16:23:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:23:22,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:22,445 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] [2020-08-18 16:23:22,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:23:22,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-08-18 16:23:22,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:22,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042556357] [2020-08-18 16:23:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:23:22,506 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:23:22,506 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:22,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:23:22,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:22 BoogieIcfgContainer [2020-08-18 16:23:22,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:22,538 INFO L168 Benchmark]: Toolchain (without parser) took 2593.27 ms. Allocated memory was 141.6 MB in the beginning and 233.3 MB in the end (delta: 91.8 MB). Free memory was 103.2 MB in the beginning and 126.1 MB in the end (delta: -22.9 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,540 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:23:22,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.20 ms. Allocated memory is still 141.6 MB. Free memory was 103.0 MB in the beginning and 91.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,543 INFO L168 Benchmark]: Boogie Preprocessor took 146.36 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 183.0 MB in the end (delta: -91.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,544 INFO L168 Benchmark]: RCFGBuilder took 359.01 ms. Allocated memory is still 205.5 MB. Free memory was 183.0 MB in the beginning and 164.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,550 INFO L168 Benchmark]: TraceAbstraction took 1835.54 ms. Allocated memory was 205.5 MB in the beginning and 233.3 MB in the end (delta: 27.8 MB). Free memory was 163.9 MB in the beginning and 126.1 MB in the end (delta: 37.9 MB). Peak memory consumption was 65.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:22,560 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.6 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.20 ms. Allocated memory is still 141.6 MB. Free memory was 103.0 MB in the beginning and 91.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.36 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 91.8 MB in the beginning and 183.0 MB in the end (delta: -91.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.01 ms. Allocated memory is still 205.5 MB. Free memory was 183.0 MB in the beginning and 164.6 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1835.54 ms. Allocated memory was 205.5 MB in the beginning and 233.3 MB in the end (delta: 27.8 MB). Free memory was 163.9 MB in the beginning and 126.1 MB in the end (delta: 37.9 MB). Peak memory consumption was 65.7 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] = 0 [L30] i=0 [L30] COND TRUE i