/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=LOWLEXORDER --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/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:15:16,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:15:16,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:15:16,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:15:16,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:15:16,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:15:16,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:15:16,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:15:16,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:15:16,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:15:16,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:15:16,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:15:16,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:15:16,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:15:16,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:15:16,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:15:16,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:15:16,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:15:16,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:15:16,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:15:16,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:15:16,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:15:16,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:15:16,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:15:16,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:15:16,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:15:16,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:15:16,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:15:16,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:15:16,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:15:16,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:15:16,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:15:16,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:15:16,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:15:16,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:15:16,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:15:16,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:15:16,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:15:16,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:15:16,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:15:16,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:15:16,453 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 18:15:16,475 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:15:16,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:15:16,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:15:16,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:15:16,477 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:15:16,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:15:16,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:15:16,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:15:16,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:15:16,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:15:16,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:15:16,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:15:16,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:15:16,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:15:16,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:15:16,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:15:16,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:15:16,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:15:16,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:15:16,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:15:16,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:15:16,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:15:16,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:15:16,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:15:16,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:15:16,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:15:16,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:15:16,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:15:16,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:15:16,485 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:15:16,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:15:16,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:15:16,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:15:16,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:15:16,782 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:15:16,783 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 18:15:16,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee262b1/fb241b48a9724ba5a4ad928bccfe8f12/FLAG93f691ac8 [2020-08-21 18:15:17,336 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:15:17,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 18:15:17,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee262b1/fb241b48a9724ba5a4ad928bccfe8f12/FLAG93f691ac8 [2020-08-21 18:15:17,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afee262b1/fb241b48a9724ba5a4ad928bccfe8f12 [2020-08-21 18:15:17,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:15:17,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:15:17,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:17,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:15:17,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:15:17,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:17" (1/1) ... [2020-08-21 18:15:17,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:17, skipping insertion in model container [2020-08-21 18:15:17,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:17" (1/1) ... [2020-08-21 18:15:17,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:15:17,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:15:17,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:17,989 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:15:18,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:18,114 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:15:18,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18 WrapperNode [2020-08-21 18:15:18,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:18,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:15:18,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:15:18,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:15:18,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:15:18,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:15:18,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:15:18,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:15:18,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (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 18:15:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:15:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:15:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:15:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:15:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:15:18,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:15:18,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:15:18,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:15:18,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:15:18,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:15:18,216 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:15:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:15:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:15:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:15:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:15:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:15:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:15:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:15:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:15:18,569 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:15:18,569 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 18:15:18,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:18 BoogieIcfgContainer [2020-08-21 18:15:18,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:15:18,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:15:18,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:15:18,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:15:18,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:15:17" (1/3) ... [2020-08-21 18:15:18,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6743a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:18, skipping insertion in model container [2020-08-21 18:15:18,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (2/3) ... [2020-08-21 18:15:18,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a6743a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:18, skipping insertion in model container [2020-08-21 18:15:18,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:18" (3/3) ... [2020-08-21 18:15:18,581 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-21 18:15:18,592 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:15:18,599 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:15:18,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:15:18,639 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:15:18,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:15:18,639 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:15:18,639 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:15:18,639 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:15:18,639 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:15:18,640 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:15:18,640 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:15:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 18:15:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:15:18,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:18,667 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] [2020-08-21 18:15:18,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 18:15:18,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:18,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290397281] [2020-08-21 18:15:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:18,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:18,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:18,870 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 18:15:18,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290397281] [2020-08-21 18:15:18,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:18,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:15:18,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235768278] [2020-08-21 18:15:18,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:15:18,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:18,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:15:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:15:18,898 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 18:15:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:19,016 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 18:15:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:15:19,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:15:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:19,028 INFO L225 Difference]: With dead ends: 56 [2020-08-21 18:15:19,028 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 18:15:19,032 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 18:15:19,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 18:15:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 18:15:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 18:15:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 18:15:19,075 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 18:15:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:19,076 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 18:15:19,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:15:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 18:15:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:15:19,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:19,078 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] [2020-08-21 18:15:19,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:15:19,078 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 18:15:19,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:19,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135546615] [2020-08-21 18:15:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,234 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 18:15:19,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135546615] [2020-08-21 18:15:19,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:19,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:15:19,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788651276] [2020-08-21 18:15:19,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:15:19,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:15:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:19,246 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 18:15:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:19,410 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 18:15:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:15:19,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 18:15:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:19,413 INFO L225 Difference]: With dead ends: 45 [2020-08-21 18:15:19,413 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 18:15:19,415 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 18:15:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 18:15:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 18:15:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:15:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 18:15:19,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 18:15:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:19,431 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 18:15:19,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:15:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 18:15:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:15:19,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:19,435 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] [2020-08-21 18:15:19,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:15:19,439 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 18:15:19,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:19,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237906917] [2020-08-21 18:15:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:15:19,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237906917] [2020-08-21 18:15:19,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:19,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:15:19,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353573010] [2020-08-21 18:15:19,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:15:19,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:15:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:15:19,616 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-21 18:15:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:19,809 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 18:15:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:15:19,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 18:15:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:19,811 INFO L225 Difference]: With dead ends: 39 [2020-08-21 18:15:19,811 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 18:15:19,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:15:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 18:15:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 18:15:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 18:15:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 18:15:19,820 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-21 18:15:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:19,820 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 18:15:19,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:15:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 18:15:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 18:15:19,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:19,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 18:15:19,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:15:19,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-21 18:15:19,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:19,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150090469] [2020-08-21 18:15:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:15:19,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150090469] [2020-08-21 18:15:19,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:15:19,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:15:19,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017866984] [2020-08-21 18:15:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:15:19,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:15:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:15:19,925 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-21 18:15:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:20,088 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 18:15:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:15:20,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-21 18:15:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:20,090 INFO L225 Difference]: With dead ends: 54 [2020-08-21 18:15:20,090 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 18:15:20,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:15:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 18:15:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 18:15:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 18:15:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-21 18:15:20,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-21 18:15:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:20,099 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-21 18:15:20,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:15:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-21 18:15:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 18:15:20,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:20,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 18:15:20,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:15:20,101 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-21 18:15:20,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:20,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153013676] [2020-08-21 18:15:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:20,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 18:15:20,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153013676] [2020-08-21 18:15:20,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:15:20,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:15:20,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020997045] [2020-08-21 18:15:20,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:15:20,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:15:20,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:20,245 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-21 18:15:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:20,336 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-21 18:15:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:15:20,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 18:15:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:20,338 INFO L225 Difference]: With dead ends: 55 [2020-08-21 18:15:20,338 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 18:15:20,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 18:15:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-21 18:15:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:15:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-21 18:15:20,346 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-21 18:15:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:20,346 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-21 18:15:20,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:15:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-21 18:15:20,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 18:15:20,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:20,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 18:15:20,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:15:20,348 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-21 18:15:20,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:20,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360506809] [2020-08-21 18:15:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:15:20,387 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:15:20,387 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:15:20,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:15:20,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:15:20 BoogieIcfgContainer [2020-08-21 18:15:20,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:15:20,414 INFO L168 Benchmark]: Toolchain (without parser) took 2658.11 ms. Allocated memory was 141.0 MB in the beginning and 233.3 MB in the end (delta: 92.3 MB). Free memory was 104.3 MB in the beginning and 118.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 78.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,415 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.85 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 104.1 MB in the beginning and 183.5 MB in the end (delta: -79.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,417 INFO L168 Benchmark]: Boogie Preprocessor took 37.73 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 181.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,418 INFO L168 Benchmark]: RCFGBuilder took 420.37 ms. Allocated memory is still 204.5 MB. Free memory was 181.2 MB in the beginning and 163.8 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,419 INFO L168 Benchmark]: TraceAbstraction took 1836.85 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 163.1 MB in the beginning and 118.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:20,423 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.85 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 104.1 MB in the beginning and 183.5 MB in the end (delta: -79.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.73 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 181.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.37 ms. Allocated memory is still 204.5 MB. Free memory was 181.2 MB in the beginning and 163.8 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1836.85 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 163.1 MB in the beginning and 118.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i