/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:18:19,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:18:19,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:18:19,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:18:19,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:18:19,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:18:19,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:18:19,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:18:19,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:18:19,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:18:19,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:18:19,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:18:19,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:18:19,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:18:19,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:18:19,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:18:19,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:18:19,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:18:19,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:18:19,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:18:19,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:18:19,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:18:19,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:18:19,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:18:19,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:18:19,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:18:19,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:18:19,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:18:19,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:18:19,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 05:18:19,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:18:19,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:18:19,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:18:19,092 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 [2020-08-19 05:18:19,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:18:19,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:18:19,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:18:19,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:18:19,134 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:18:19,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:18:19,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:18:19,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:18:19,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:18:19,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:18:19,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:18:19,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:18:19,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:18:19,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:18:19,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:18:19,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:18:19,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:18:19,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:18:19,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:18:19,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:18:19,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:18:19,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:18:19,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:18:19,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:18:19,480 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:18:19,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-08-19 05:18:19,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/239697edd/cfe66b40c7c144c18e74f477ab633f08/FLAGe4ff16925 [2020-08-19 05:18:20,035 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:18:20,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1f.c [2020-08-19 05:18:20,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/239697edd/cfe66b40c7c144c18e74f477ab633f08/FLAGe4ff16925 [2020-08-19 05:18:20,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/239697edd/cfe66b40c7c144c18e74f477ab633f08 [2020-08-19 05:18:20,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:18:20,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:18:20,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:18:20,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:18:20,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:18:20,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20, skipping insertion in model container [2020-08-19 05:18:20,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:18:20,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:18:20,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:18:20,666 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:18:20,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:18:20,713 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:18:20,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20 WrapperNode [2020-08-19 05:18:20,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:18:20,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:18:20,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:18:20,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:18:20,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (1/1) ... [2020-08-19 05:18:20,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:18:20,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:18:20,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:18:20,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:18:20,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (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 [2020-08-19 05:18:20,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:18:20,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:18:20,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 05:18:20,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 05:18:20,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:18:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:18:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 05:18:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 05:18:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 05:18:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:18:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 05:18:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:18:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 05:18:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 05:18:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 05:18:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 05:18:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 05:18:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:18:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:18:21,326 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:18:21,326 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 05:18:21,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:18:21 BoogieIcfgContainer [2020-08-19 05:18:21,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:18:21,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:18:21,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:18:21,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:18:21,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:18:20" (1/3) ... [2020-08-19 05:18:21,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a42e4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:18:21, skipping insertion in model container [2020-08-19 05:18:21,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:18:20" (2/3) ... [2020-08-19 05:18:21,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a42e4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:18:21, skipping insertion in model container [2020-08-19 05:18:21,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:18:21" (3/3) ... [2020-08-19 05:18:21,339 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-08-19 05:18:21,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:18:21,356 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:18:21,370 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:18:21,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:18:21,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:18:21,393 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:18:21,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:18:21,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:18:21,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:18:21,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:18:21,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:18:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 05:18:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:18:21,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:18:21,430 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] [2020-08-19 05:18:21,430 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:18:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:18:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-19 05:18:21,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:18:21,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970704822] [2020-08-19 05:18:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:18:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:21,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:18:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:21,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 05:18:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:18:21,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970704822] [2020-08-19 05:18:21,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:18:21,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:18:21,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164382] [2020-08-19 05:18:21,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:18:21,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:18:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:18:21,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:18:21,693 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-19 05:18:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:18:21,817 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-19 05:18:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:18:21,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:18:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:18:21,827 INFO L225 Difference]: With dead ends: 56 [2020-08-19 05:18:21,828 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 05:18:21,831 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 [2020-08-19 05:18:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 05:18:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 05:18:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 05:18:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-19 05:18:21,869 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-08-19 05:18:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:18:21,870 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-19 05:18:21,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:18:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-19 05:18:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:18:21,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:18:21,872 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] [2020-08-19 05:18:21,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:18:21,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:18:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:18:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-19 05:18:21,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:18:21,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970923786] [2020-08-19 05:18:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:18:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:22,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:18:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:22,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 05:18:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:18:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:18:22,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970923786] [2020-08-19 05:18:22,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:18:22,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:18:22,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114041569] [2020-08-19 05:18:22,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:18:22,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:18:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:18:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:18:22,056 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-08-19 05:18:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:18:22,196 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-08-19 05:18:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:18:22,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-19 05:18:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:18:22,198 INFO L225 Difference]: With dead ends: 42 [2020-08-19 05:18:22,199 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 05:18:22,200 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 [2020-08-19 05:18:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 05:18:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-08-19 05:18:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-19 05:18:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-19 05:18:22,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-08-19 05:18:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:18:22,209 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-19 05:18:22,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:18:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-19 05:18:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:18:22,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:18:22,211 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] [2020-08-19 05:18:22,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:18:22,211 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:18:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:18:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-19 05:18:22,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:18:22,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347901958] [2020-08-19 05:18:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:18:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 05:18:22,250 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 05:18:22,250 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 05:18:22,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:18:22,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:18:22 BoogieIcfgContainer [2020-08-19 05:18:22,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:18:22,274 INFO L168 Benchmark]: Toolchain (without parser) took 1866.15 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 110.6 MB in the end (delta: -8.5 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,275 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.14 ms. Allocated memory is still 140.5 MB. Free memory was 101.6 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,277 INFO L168 Benchmark]: Boogie Preprocessor took 176.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 180.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,278 INFO L168 Benchmark]: RCFGBuilder took 438.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 163.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,279 INFO L168 Benchmark]: TraceAbstraction took 939.93 ms. Allocated memory is still 203.4 MB. Free memory was 163.3 MB in the beginning and 110.6 MB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:18:22,283 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.14 ms. Allocated memory is still 140.5 MB. Free memory was 101.6 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 176.96 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 90.9 MB in the beginning and 180.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.56 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 163.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 939.93 ms. Allocated memory is still 203.4 MB. Free memory was 163.3 MB in the beginning and 110.6 MB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 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] i=0 [L29] COND TRUE i