/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=BIGGEST --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/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:27:12,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:27:12,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:27:12,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:27:12,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:27:12,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:27:12,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:27:12,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:27:12,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:27:12,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:27:12,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:27:12,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:27:12,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:27:12,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:27:12,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:27:12,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:27:12,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:27:12,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:27:12,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:27:12,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:27:12,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:27:12,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:27:12,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:27:12,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:27:12,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:27:12,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:27:12,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:27:12,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:27:12,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:27:12,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 17:27:12,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 17:27:12,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 17:27:12,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 17:27:12,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 17:27:12,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 17:27:12,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 17:27:12,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 17:27:12,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 17:27:12,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:27:12,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:27:12,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:27:12,151 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 17:27:12,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:27:12,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:27:12,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:27:12,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:27:12,174 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:27:12,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:27:12,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:27:12,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:27:12,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:27:12,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:27:12,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:27:12,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:27:12,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:27:12,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:27:12,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:27:12,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:27:12,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:27:12,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:27:12,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:27:12,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:27:12,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:27:12,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:27:12,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:27:12,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:27:12,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:27:12,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:27:12,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:27:12,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:27:12,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:27:12,179 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:27:12,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:27:12,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:27:12,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:27:12,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:27:12,516 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:27:12,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-08-21 17:27:12,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f6fad9e2/532f969a06294780be81b92327aae7d2/FLAGd111e7d5c [2020-08-21 17:27:13,035 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:27:13,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/modnf.c [2020-08-21 17:27:13,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f6fad9e2/532f969a06294780be81b92327aae7d2/FLAGd111e7d5c [2020-08-21 17:27:13,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f6fad9e2/532f969a06294780be81b92327aae7d2 [2020-08-21 17:27:13,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:27:13,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:27:13,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:13,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:27:13,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:27:13,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ebed4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13, skipping insertion in model container [2020-08-21 17:27:13,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:27:13,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:27:13,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:13,712 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:27:13,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:13,749 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:27:13,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13 WrapperNode [2020-08-21 17:27:13,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:13,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:27:13,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:27:13,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:27:13,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... [2020-08-21 17:27:13,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:27:13,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:27:13,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:27:13,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:27:13,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:27:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:27:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:27:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 17:27:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 17:27:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:27:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:27:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:27:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 17:27:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 17:27:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:27:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 17:27:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:27:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:27:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 17:27:13,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:27:13,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:27:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:27:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:27:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:27:14,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:27:14,328 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 17:27:14,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:14 BoogieIcfgContainer [2020-08-21 17:27:14,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:27:14,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:27:14,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:27:14,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:27:14,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:27:13" (1/3) ... [2020-08-21 17:27:14,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:14, skipping insertion in model container [2020-08-21 17:27:14,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:13" (2/3) ... [2020-08-21 17:27:14,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:14, skipping insertion in model container [2020-08-21 17:27:14,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:14" (3/3) ... [2020-08-21 17:27:14,340 INFO L109 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-08-21 17:27:14,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:27:14,355 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:27:14,369 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:27:14,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:27:14,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:27:14,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:27:14,390 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:27:14,390 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:27:14,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:27:14,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:27:14,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:27:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-21 17:27:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:27:14,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:14,417 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] [2020-08-21 17:27:14,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-08-21 17:27:14,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:14,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073506490] [2020-08-21 17:27:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:27:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,636 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 17:27:14,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073506490] [2020-08-21 17:27:14,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:14,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:27:14,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466592634] [2020-08-21 17:27:14,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:27:14,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:27:14,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:27:14,664 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-21 17:27:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:14,775 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-08-21 17:27:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:27:14,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:27:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:14,787 INFO L225 Difference]: With dead ends: 58 [2020-08-21 17:27:14,787 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 17:27:14,791 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 17:27:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 17:27:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-21 17:27:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-21 17:27:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-21 17:27:14,835 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-08-21 17:27:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:14,836 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-21 17:27:14,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:27:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-21 17:27:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:27:14,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:14,837 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] [2020-08-21 17:27:14,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:27:14,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-08-21 17:27:14,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:14,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263422433] [2020-08-21 17:27:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:27:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,997 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 17:27:14,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263422433] [2020-08-21 17:27:14,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:14,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:27:14,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390159506] [2020-08-21 17:27:15,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:15,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:15,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:15,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:15,003 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-08-21 17:27:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:15,147 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-21 17:27:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:27:15,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 17:27:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:15,151 INFO L225 Difference]: With dead ends: 51 [2020-08-21 17:27:15,151 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 17:27:15,152 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 17:27:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 17:27:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-08-21 17:27:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 17:27:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-21 17:27:15,165 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-08-21 17:27:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:15,165 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-21 17:27:15,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-21 17:27:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:27:15,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:15,167 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] [2020-08-21 17:27:15,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:27:15,167 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-08-21 17:27:15,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:15,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351429351] [2020-08-21 17:27:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:15,187 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 17:27:15,187 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 17:27:15,187 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 17:27:15,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:27:15,209 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 17:27:15,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:27:15 BoogieIcfgContainer [2020-08-21 17:27:15,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:27:15,212 INFO L168 Benchmark]: Toolchain (without parser) took 1744.40 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.7 MB in the beginning and 106.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,213 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.67 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,216 INFO L168 Benchmark]: Boogie Preprocessor took 113.33 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,217 INFO L168 Benchmark]: RCFGBuilder took 468.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 162.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,218 INFO L168 Benchmark]: TraceAbstraction took 876.04 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 106.6 MB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:15,222 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.67 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 91.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.33 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.0 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 468.39 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 162.3 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 876.04 ms. Allocated memory is still 201.9 MB. Free memory was 161.6 MB in the beginning and 106.6 MB in the end (delta: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i