/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:28:04,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:04,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:04,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:04,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:04,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:04,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:04,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:04,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:04,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:04,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:04,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:04,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:04,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:04,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:04,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:04,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:04,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:04,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:04,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:04,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:04,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:04,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:04,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:04,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:04,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:04,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:04,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:04,501 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 [2020-09-21 10:28:04,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:04,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:04,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:04,530 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:04,531 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:04,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:04,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:04,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:04,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:04,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:04,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:04,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:04,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:04,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:04,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:04,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:04,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:04,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:04,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:04,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:04,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:04,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:04,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:04,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:04,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:04,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:04,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:04,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:04,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:04,537 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 -> false [2020-09-21 10:28:05,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:05,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:05,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:05,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:05,079 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:05,080 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-09-21 10:28:05,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d84eb1b79/ed1ad7afb1a04d5db3dacb55f5a0c71d/FLAG2e763105d [2020-09-21 10:28:05,733 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:05,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-09-21 10:28:05,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d84eb1b79/ed1ad7afb1a04d5db3dacb55f5a0c71d/FLAG2e763105d [2020-09-21 10:28:06,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d84eb1b79/ed1ad7afb1a04d5db3dacb55f5a0c71d [2020-09-21 10:28:06,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:06,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:06,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:06,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:06,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:06,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06, skipping insertion in model container [2020-09-21 10:28:06,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:06,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:06,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:06,415 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:06,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:06,460 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:06,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06 WrapperNode [2020-09-21 10:28:06,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:06,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:06,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:06,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:06,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (1/1) ... [2020-09-21 10:28:06,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:06,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:06,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:06,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:06,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (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 [2020-09-21 10:28:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:28:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:06,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:28:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:06,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:07,026 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:07,027 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:28:07,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:07 BoogieIcfgContainer [2020-09-21 10:28:07,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:07,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:07,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:07,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:07,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:06" (1/3) ... [2020-09-21 10:28:07,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:07, skipping insertion in model container [2020-09-21 10:28:07,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:06" (2/3) ... [2020-09-21 10:28:07,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:07, skipping insertion in model container [2020-09-21 10:28:07,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:07" (3/3) ... [2020-09-21 10:28:07,043 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-09-21 10:28:07,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:07,066 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:07,092 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:07,123 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:07,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:07,124 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:07,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:07,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:07,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:07,124 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:07,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 10:28:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:07,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,157 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] [2020-09-21 10:28:07,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-09-21 10:28:07,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383435081] [2020-09-21 10:28:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:07,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383435081] [2020-09-21 10:28:07,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:07,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:07,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151848614] [2020-09-21 10:28:07,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:07,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:07,466 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-09-21 10:28:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,639 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-09-21 10:28:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:07,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:28:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,664 INFO L225 Difference]: With dead ends: 56 [2020-09-21 10:28:07,664 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:28:07,671 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 [2020-09-21 10:28:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:28:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 10:28:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:28:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-09-21 10:28:07,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-09-21 10:28:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,739 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-09-21 10:28:07,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-09-21 10:28:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:07,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,742 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] [2020-09-21 10:28:07,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:07,743 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-09-21 10:28:07,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184332208] [2020-09-21 10:28:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:07,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184332208] [2020-09-21 10:28:07,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:07,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:07,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604637952] [2020-09-21 10:28:07,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:07,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:07,904 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-09-21 10:28:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:08,046 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 10:28:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:08,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 10:28:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:08,048 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:28:08,048 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:28:08,050 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 [2020-09-21 10:28:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:28:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 10:28:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:28:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 10:28:08,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-09-21 10:28:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:08,060 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 10:28:08,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 10:28:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:28:08,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:08,061 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] [2020-09-21 10:28:08,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:08,062 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-09-21 10:28:08,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:08,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350722717] [2020-09-21 10:28:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:28:08,115 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:28:08,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:08,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:08,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:08 BoogieIcfgContainer [2020-09-21 10:28:08,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:08,146 INFO L168 Benchmark]: Toolchain (without parser) took 2028.43 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 100.3 MB in the beginning and 105.5 MB in the end (delta: -5.1 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:08,148 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:28:08,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.90 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 89.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:08,151 INFO L168 Benchmark]: Boogie Preprocessor took 127.77 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 89.2 MB in the beginning and 176.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:08,157 INFO L168 Benchmark]: RCFGBuilder took 442.80 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 159.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:08,158 INFO L168 Benchmark]: TraceAbstraction took 1108.46 ms. Allocated memory is still 199.2 MB. Free memory was 159.1 MB in the beginning and 105.5 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:08,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 339.90 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 89.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.77 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 89.2 MB in the beginning and 176.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 442.80 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 159.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1108.46 ms. Allocated memory is still 199.2 MB. Free memory was 159.1 MB in the beginning and 105.5 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i