/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s42iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:02:28,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:02:28,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:02:28,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 15:02:28,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:02:28,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:02:28,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:02:28,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:02:28,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:02:28,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:02:28,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:02:28,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:02:28,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:02:28,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:02:28,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:02:28,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:02:28,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:02:28,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:02:28,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:02:28,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:02:28,850 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 15:02:28,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:02:28,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:02:28,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:02:28,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:02:28,873 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:02:28,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:02:28,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:02:28,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:02:28,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:02:28,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:02:28,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:02:28,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:02:28,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:02:28,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:02:28,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:02:28,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:02:28,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:02:28,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:02:28,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:02:28,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:02:28,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:02:28,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:02:28,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:02:28,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:02:28,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:02:28,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:02:28,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:02:28,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:02:28,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:02:28,878 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:02:29,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:02:29,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:02:29,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:02:29,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:02:29,207 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:02:29,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42iff.c [2020-08-21 15:02:29,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53756877f/3ca5e06ada2a4c87b2ad7d74661d4957/FLAGabebaa44f [2020-08-21 15:02:29,784 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:02:29,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s42iff.c [2020-08-21 15:02:29,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53756877f/3ca5e06ada2a4c87b2ad7d74661d4957/FLAGabebaa44f [2020-08-21 15:02:30,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53756877f/3ca5e06ada2a4c87b2ad7d74661d4957 [2020-08-21 15:02:30,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:02:30,179 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:02:30,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:30,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:02:30,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:02:30,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9488dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30, skipping insertion in model container [2020-08-21 15:02:30,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:02:30,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:02:30,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:30,406 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:02:30,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:30,520 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:02:30,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30 WrapperNode [2020-08-21 15:02:30,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:30,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:02:30,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:02:30,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:02:30,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (1/1) ... [2020-08-21 15:02:30,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:02:30,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:02:30,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:02:30,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:02:30,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (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 15:02:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:02:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:02:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:02:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:02:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:02:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:02:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:02:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:02:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:02:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:02:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:02:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:02:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:02:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:02:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:02:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:02:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:02:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:02:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:02:30,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:02:30,921 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 15:02:30,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:02:30 BoogieIcfgContainer [2020-08-21 15:02:30,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:02:30,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:02:30,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:02:30,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:02:30,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:02:30" (1/3) ... [2020-08-21 15:02:30,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea4b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:02:30, skipping insertion in model container [2020-08-21 15:02:30,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:30" (2/3) ... [2020-08-21 15:02:30,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea4b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:02:30, skipping insertion in model container [2020-08-21 15:02:30,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:02:30" (3/3) ... [2020-08-21 15:02:30,935 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2020-08-21 15:02:30,950 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:02:30,957 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:02:30,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:02:31,007 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:02:31,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:02:31,008 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:02:31,008 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:02:31,008 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:02:31,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:02:31,009 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:02:31,009 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:02:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-21 15:02:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:02:31,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:31,048 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] [2020-08-21 15:02:31,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-08-21 15:02:31,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:31,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791852599] [2020-08-21 15:02:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:02:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,265 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 15:02:31,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791852599] [2020-08-21 15:02:31,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:02:31,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:02:31,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225796266] [2020-08-21 15:02:31,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:02:31,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:02:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:02:31,293 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-21 15:02:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:31,432 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-21 15:02:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:02:31,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:02:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:31,444 INFO L225 Difference]: With dead ends: 62 [2020-08-21 15:02:31,444 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 15:02:31,448 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 [2020-08-21 15:02:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 15:02:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-21 15:02:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 15:02:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-21 15:02:31,492 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-08-21 15:02:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:31,493 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-21 15:02:31,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:02:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-21 15:02:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:02:31,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:31,495 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] [2020-08-21 15:02:31,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:02:31,496 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-08-21 15:02:31,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:31,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218346129] [2020-08-21 15:02:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:02:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:02:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:02:31,638 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 15:02:31,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218346129] [2020-08-21 15:02:31,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:02:31,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:02:31,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442509865] [2020-08-21 15:02:31,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:02:31,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:02:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:02:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:02:31,643 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-08-21 15:02:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:02:31,783 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-08-21 15:02:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:02:31,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-21 15:02:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:02:31,786 INFO L225 Difference]: With dead ends: 51 [2020-08-21 15:02:31,786 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 15:02:31,788 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 [2020-08-21 15:02:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 15:02:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-21 15:02:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 15:02:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-21 15:02:31,798 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-08-21 15:02:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:02:31,799 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-21 15:02:31,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:02:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-21 15:02:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 15:02:31,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:02:31,802 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] [2020-08-21 15:02:31,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:02:31,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:02:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:02:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-08-21 15:02:31,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:02:31,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493971582] [2020-08-21 15:02:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:02:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:02:31,912 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:02:31,913 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:02:31,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:02:31,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:02:31 BoogieIcfgContainer [2020-08-21 15:02:31,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:02:31,939 INFO L168 Benchmark]: Toolchain (without parser) took 1758.93 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.7 MB in the beginning and 103.3 MB in the end (delta: -540.2 kB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:31,940 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:02:31,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.36 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 181.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:31,942 INFO L168 Benchmark]: Boogie Preprocessor took 37.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 179.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:31,943 INFO L168 Benchmark]: RCFGBuilder took 368.06 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 160.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:31,944 INFO L168 Benchmark]: TraceAbstraction took 1007.23 ms. Allocated memory is still 202.4 MB. Free memory was 159.8 MB in the beginning and 103.3 MB in the end (delta: 56.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:02:31,948 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.36 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.5 MB in the beginning and 181.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.46 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 179.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.06 ms. Allocated memory is still 202.4 MB. Free memory was 178.3 MB in the beginning and 160.4 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1007.23 ms. Allocated memory is still 202.4 MB. Free memory was 159.8 MB in the beginning and 103.3 MB in the end (delta: 56.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i