/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:01:35,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:01:35,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:01:35,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:01:35,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:01:35,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:01:35,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:01:35,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:01:35,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:01:35,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:01:35,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:01:35,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:01:35,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:01:35,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:01:35,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:01:35,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:01:35,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:01:35,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:01:35,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:01:35,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:01:35,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:01:35,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:01:35,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:01:35,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:01:35,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:01:35,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:01:35,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:01:35,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:01:35,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:01:35,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:01:35,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:01:35,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:01:35,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:01:35,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:01:35,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:01:35,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:01:35,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:01:35,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:01:35,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:01:35,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:01:35,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:01:35,373 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 [2020-08-18 22:01:35,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:01:35,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:01:35,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:01:35,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:01:35,429 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:01:35,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:01:35,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:01:35,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:01:35,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:01:35,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:01:35,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:01:35,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:01:35,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:01:35,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:01:35,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:01:35,432 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:01:35,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:01:35,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:01:35,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:01:35,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:01:35,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:01:35,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:01:35,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:01:35,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:01:35,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:01:35,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:01:35,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:01:35,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:01:35,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:01:35,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:01:35,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:01:35,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:01:35,755 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:01:35,756 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:01:35,757 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:01:35,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-18 22:01:35,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950485aa0/0ddb378fbca84f02b04f8a856fb13412/FLAG00811a0ee [2020-08-18 22:01:36,299 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:01:36,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-18 22:01:36,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950485aa0/0ddb378fbca84f02b04f8a856fb13412/FLAG00811a0ee [2020-08-18 22:01:36,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/950485aa0/0ddb378fbca84f02b04f8a856fb13412 [2020-08-18 22:01:36,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:01:36,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:01:36,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:36,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:01:36,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:01:36,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:36" (1/1) ... [2020-08-18 22:01:36,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb2c9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:36, skipping insertion in model container [2020-08-18 22:01:36,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:01:36" (1/1) ... [2020-08-18 22:01:36,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:01:36,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:01:36,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:36,978 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:01:37,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:01:37,110 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:01:37,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37 WrapperNode [2020-08-18 22:01:37,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:01:37,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:01:37,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:01:37,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:01:37,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (1/1) ... [2020-08-18 22:01:37,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:01:37,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:01:37,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:01:37,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:01:37,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (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 [2020-08-18 22:01:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:01:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:01:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:01:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:01:37,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:01:37,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:01:37,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:01:37,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:01:37,519 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:01:37,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:37 BoogieIcfgContainer [2020-08-18 22:01:37,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:01:37,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:01:37,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:01:37,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:01:37,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:01:36" (1/3) ... [2020-08-18 22:01:37,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18293ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:37, skipping insertion in model container [2020-08-18 22:01:37,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:01:37" (2/3) ... [2020-08-18 22:01:37,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18293ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:01:37, skipping insertion in model container [2020-08-18 22:01:37,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:01:37" (3/3) ... [2020-08-18 22:01:37,532 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-18 22:01:37,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:01:37,550 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:01:37,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:01:37,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:01:37,598 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:01:37,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:01:37,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:01:37,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:01:37,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:01:37,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:01:37,599 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:01:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 22:01:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:01:37,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:37,627 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] [2020-08-18 22:01:37,628 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 22:01:37,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:37,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938129940] [2020-08-18 22:01:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:37,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:37,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:01:37,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938129940] [2020-08-18 22:01:37,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:37,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:01:37,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417398234] [2020-08-18 22:01:37,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:01:37,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:37,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:01:37,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:01:37,881 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 22:01:38,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:38,001 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 22:01:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:01:38,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:01:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:38,013 INFO L225 Difference]: With dead ends: 56 [2020-08-18 22:01:38,013 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:01:38,018 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 [2020-08-18 22:01:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:01:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 22:01:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:01:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 22:01:38,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-18 22:01:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:38,062 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 22:01:38,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:01:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 22:01:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:01:38,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,064 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] [2020-08-18 22:01:38,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:01:38,065 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 22:01:38,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003905669] [2020-08-18 22:01:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:01:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003905669] [2020-08-18 22:01:38,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:38,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:01:38,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754593763] [2020-08-18 22:01:38,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:01:38,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:38,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:01:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:01:38,194 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-18 22:01:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:38,386 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 22:01:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:01:38,387 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 22:01:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:38,388 INFO L225 Difference]: With dead ends: 45 [2020-08-18 22:01:38,389 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:01:38,390 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 [2020-08-18 22:01:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:01:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:01:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:01:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 22:01:38,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-18 22:01:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:38,400 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 22:01:38,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:01:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 22:01:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:01:38,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,401 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] [2020-08-18 22:01:38,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:01:38,402 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 22:01:38,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843724748] [2020-08-18 22:01:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 22:01:38,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843724748] [2020-08-18 22:01:38,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:01:38,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:01:38,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671061237] [2020-08-18 22:01:38,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:01:38,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:38,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:01:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:01:38,632 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-18 22:01:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:38,863 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 22:01:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:01:38,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 22:01:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:38,865 INFO L225 Difference]: With dead ends: 39 [2020-08-18 22:01:38,866 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 22:01:38,867 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 [2020-08-18 22:01:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 22:01:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 22:01:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 22:01:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 22:01:38,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-18 22:01:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:38,881 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 22:01:38,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:01:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 22:01:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 22:01:38,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:38,884 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] [2020-08-18 22:01:38,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:01:38,885 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:38,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-18 22:01:38,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:38,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117750132] [2020-08-18 22:01:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:39,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:01:39,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117750132] [2020-08-18 22:01:39,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:01:39,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:01:39,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889237731] [2020-08-18 22:01:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:01:39,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:01:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:01:39,012 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-18 22:01:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:39,174 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-18 22:01:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:01:39,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-18 22:01:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:39,176 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:01:39,176 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:01:39,177 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 [2020-08-18 22:01:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:01:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 22:01:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 22:01:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 22:01:39,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-18 22:01:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:39,185 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 22:01:39,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:01:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 22:01:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:01:39,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:39,187 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] [2020-08-18 22:01:39,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:01:39,188 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:39,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-18 22:01:39,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:39,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759578225] [2020-08-18 22:01:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:39,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:01:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:01:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:01:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:01:39,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759578225] [2020-08-18 22:01:39,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:01:39,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:01:39,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726452665] [2020-08-18 22:01:39,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:01:39,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:01:39,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:01:39,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:01:39,304 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-18 22:01:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:01:39,402 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-18 22:01:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:01:39,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 22:01:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:01:39,404 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:01:39,404 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:01:39,405 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 [2020-08-18 22:01:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:01:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-18 22:01:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:01:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 22:01:39,412 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-18 22:01:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:01:39,412 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 22:01:39,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:01:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 22:01:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:01:39,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:01:39,414 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] [2020-08-18 22:01:39,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:01:39,414 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:01:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:01:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-18 22:01:39,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:01:39,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850430291] [2020-08-18 22:01:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:01:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:01:39,447 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:01:39,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:01:39,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:01:39,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:01:39 BoogieIcfgContainer [2020-08-18 22:01:39,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:01:39,472 INFO L168 Benchmark]: Toolchain (without parser) took 2757.31 ms. Allocated memory was 148.4 MB in the beginning and 233.8 MB in the end (delta: 85.5 MB). Free memory was 104.6 MB in the beginning and 118.8 MB in the end (delta: -14.2 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,473 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.75 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 104.3 MB in the beginning and 183.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,475 INFO L168 Benchmark]: Boogie Preprocessor took 41.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 180.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,476 INFO L168 Benchmark]: RCFGBuilder took 369.06 ms. Allocated memory is still 204.5 MB. Free memory was 180.7 MB in the beginning and 164.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,477 INFO L168 Benchmark]: TraceAbstraction took 1944.70 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 118.8 MB in the end (delta: 44.8 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:01:39,481 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.75 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 104.3 MB in the beginning and 183.0 MB in the end (delta: -78.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 180.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.06 ms. Allocated memory is still 204.5 MB. Free memory was 180.7 MB in the beginning and 164.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1944.70 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 118.8 MB in the end (delta: 44.8 MB). Peak memory consumption was 74.1 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