/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=SMALLEST --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 15:50:22,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:50:22,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:50:22,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:50:22,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:50:22,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:50:22,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:50:22,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:50:22,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:50:22,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:50:22,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:50:22,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:50:22,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:50:22,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:50:22,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:50:22,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:50:22,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:50:22,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:50:22,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:50:22,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:50:22,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:50:22,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:50:22,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:50:22,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:50:22,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:50:22,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:50:22,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:50:22,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:50:22,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:50:22,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:50:22,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:50:22,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:50:22,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:50:22,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:50:22,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:50:22,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:50:22,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:50:22,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:50:22,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:50:22,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:50:22,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:50:22,474 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:50:22,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:50:22,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:50:22,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:50:22,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:50:22,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:50:22,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:50:22,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:50:22,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:50:22,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:50:22,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:50:22,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:50:22,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:50:22,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:50:22,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:50:22,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:50:22,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:50:22,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:50:22,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:50:22,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:50:22,479 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:50:22,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:50:22,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:50:22,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:50:22,841 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:50:22,842 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:50:22,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 15:50:22,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/492d40f27/f8c9ddbadce44c7c94a8696193e22d41/FLAG73a5f9402 [2020-08-21 15:50:23,354 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:50:23,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 15:50:23,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/492d40f27/f8c9ddbadce44c7c94a8696193e22d41/FLAG73a5f9402 [2020-08-21 15:50:23,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/492d40f27/f8c9ddbadce44c7c94a8696193e22d41 [2020-08-21 15:50:23,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:50:23,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:50:23,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:50:23,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:50:23,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:50:23,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:23,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfdf45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23, skipping insertion in model container [2020-08-21 15:50:23,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:23,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:50:23,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:50:23,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:50:23,929 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:50:23,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:50:23,962 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:50:23,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23 WrapperNode [2020-08-21 15:50:23,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:50:23,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:50:23,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:50:23,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:50:24,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:50:24,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:50:24,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:50:24,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:50:24,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:50:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:50:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:50:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:50:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:50:24,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:50:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:50:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:50:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:50:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:50:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:50:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:50:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:50:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:50:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:50:24,509 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:50:24,510 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 15:50:24,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:50:24 BoogieIcfgContainer [2020-08-21 15:50:24,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:50:24,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:50:24,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:50:24,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:50:24,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:50:23" (1/3) ... [2020-08-21 15:50:24,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b2dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:50:24, skipping insertion in model container [2020-08-21 15:50:24,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (2/3) ... [2020-08-21 15:50:24,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b2dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:50:24, skipping insertion in model container [2020-08-21 15:50:24,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:50:24" (3/3) ... [2020-08-21 15:50:24,524 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-21 15:50:24,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:50:24,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:50:24,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:50:24,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:50:24,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:50:24,574 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:50:24,574 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:50:24,574 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:50:24,574 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:50:24,574 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:50:24,575 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:50:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 15:50:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:50:24,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:24,600 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 15:50:24,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 15:50:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:24,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488171119] [2020-08-21 15:50:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:24,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488171119] [2020-08-21 15:50:24,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:24,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:50:24,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641801517] [2020-08-21 15:50:24,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:50:24,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:50:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:50:24,842 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 15:50:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:24,960 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 15:50:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:50:24,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:50:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:24,972 INFO L225 Difference]: With dead ends: 56 [2020-08-21 15:50:24,973 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:50:24,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:50:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:50:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 15:50:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 15:50:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 15:50:25,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 15:50:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,016 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 15:50:25,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:50:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 15:50:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:50:25,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,018 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 15:50:25,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:50:25,018 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 15:50:25,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768434996] [2020-08-21 15:50:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:25,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768434996] [2020-08-21 15:50:25,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:25,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:50:25,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296200886] [2020-08-21 15:50:25,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:50:25,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:50:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:50:25,142 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 15:50:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:25,273 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 15:50:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:50:25,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 15:50:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:25,275 INFO L225 Difference]: With dead ends: 45 [2020-08-21 15:50:25,275 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 15:50:25,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:50:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 15:50:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 15:50:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 15:50:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 15:50:25,285 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 15:50:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,286 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 15:50:25,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:50:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 15:50:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:50:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,287 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 15:50:25,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:50:25,288 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 15:50:25,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295826753] [2020-08-21 15:50:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,460 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 15:50:25,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295826753] [2020-08-21 15:50:25,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:25,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:50:25,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349989083] [2020-08-21 15:50:25,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:50:25,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:50:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:50:25,464 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-21 15:50:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:25,696 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 15:50:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:50:25,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 15:50:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:25,698 INFO L225 Difference]: With dead ends: 39 [2020-08-21 15:50:25,698 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:50:25,699 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 15:50:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:50:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 15:50:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 15:50:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 15:50:25,708 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-21 15:50:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,708 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 15:50:25,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:50:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 15:50:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 15:50:25,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,710 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 15:50:25,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:50:25,711 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-21 15:50:25,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9951903] [2020-08-21 15:50:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,874 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 15:50:25,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9951903] [2020-08-21 15:50:25,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:25,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:50:25,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590390469] [2020-08-21 15:50:25,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:50:25,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:50:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:50:25,878 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-21 15:50:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:26,075 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 15:50:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:50:26,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-21 15:50:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:26,077 INFO L225 Difference]: With dead ends: 54 [2020-08-21 15:50:26,077 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 15:50:26,078 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 15:50:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 15:50:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 15:50:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 15:50:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-21 15:50:26,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-21 15:50:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:26,094 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-21 15:50:26,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:50:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-21 15:50:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 15:50:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:26,098 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 15:50:26,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:50:26,098 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:26,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:26,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-21 15:50:26,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:26,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276258778] [2020-08-21 15:50:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,274 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 15:50:26,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276258778] [2020-08-21 15:50:26,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:26,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:50:26,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109621003] [2020-08-21 15:50:26,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:50:26,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:26,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:50:26,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:50:26,280 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-21 15:50:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:26,393 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-21 15:50:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:50:26,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 15:50:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:26,395 INFO L225 Difference]: With dead ends: 55 [2020-08-21 15:50:26,395 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 15:50:26,396 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 15:50:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 15:50:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-21 15:50:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 15:50:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-21 15:50:26,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-21 15:50:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:26,405 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-21 15:50:26,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:50:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-21 15:50:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 15:50:26,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:26,407 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 15:50:26,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:50:26,407 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:26,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:26,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-21 15:50:26,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:26,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932944813] [2020-08-21 15:50:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:50:26,476 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:50:26,478 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:50:26,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:50:26,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:50:26 BoogieIcfgContainer [2020-08-21 15:50:26,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:50:26,508 INFO L168 Benchmark]: Toolchain (without parser) took 2796.65 ms. Allocated memory was 140.5 MB in the beginning and 234.9 MB in the end (delta: 94.4 MB). Free memory was 103.5 MB in the beginning and 123.6 MB in the end (delta: -20.1 MB). Peak memory consumption was 74.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,510 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.64 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,522 INFO L168 Benchmark]: Boogie Preprocessor took 136.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,524 INFO L168 Benchmark]: RCFGBuilder took 414.87 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,526 INFO L168 Benchmark]: TraceAbstraction took 1988.73 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 163.4 MB in the beginning and 123.6 MB in the end (delta: 39.8 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:26,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.64 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.36 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.87 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1988.73 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 163.4 MB in the beginning and 123.6 MB in the end (delta: 39.8 MB). Peak memory consumption was 71.2 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