/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:59:31,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:59:31,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:59:31,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:59:31,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:59:31,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:59:31,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:59:31,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:59:31,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:59:31,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:59:31,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:59:31,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:59:31,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:59:31,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:59:31,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:59:31,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:59:31,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:59:31,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:59:31,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:59:31,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:59:31,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:59:31,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:59:31,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:59:31,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:59:31,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:59:31,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:59:31,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:59:31,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:59:31,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:59:31,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:59:31,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:59:31,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:59:31,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:59:31,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:59:31,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:59:31,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:59:31,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:59:31,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:59:31,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:59:31,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:59:31,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:59:31,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 05:59:31,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:59:31,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:59:31,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:59:31,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:59:31,612 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:59:31,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:59:31,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:59:31,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:59:31,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:59:31,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:59:31,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:59:31,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:59:31,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:59:31,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:59:31,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:59:31,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:59:31,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:59:31,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:59:31,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:59:31,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:59:31,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:59:31,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:59:31,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:59:31,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:59:31,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:59:31,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:59:31,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:59:31,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:59:31,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:59:31,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 05:59:31,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:59:31,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:59:31,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:59:31,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:59:31,996 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:59:31,997 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-19 05:59:32,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67c5bbe91/113fdaab1634475a8477be5891cf7ac7/FLAG67dc0e995 [2020-08-19 05:59:32,548 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:59:32,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-19 05:59:32,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67c5bbe91/113fdaab1634475a8477be5891cf7ac7/FLAG67dc0e995 [2020-08-19 05:59:32,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67c5bbe91/113fdaab1634475a8477be5891cf7ac7 [2020-08-19 05:59:32,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:59:32,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:59:32,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:32,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:59:32,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:59:32,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:32" (1/1) ... [2020-08-19 05:59:32,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e014d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:32, skipping insertion in model container [2020-08-19 05:59:32,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:32" (1/1) ... [2020-08-19 05:59:32,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:59:32,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:59:33,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:33,154 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:59:33,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:33,182 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:59:33,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33 WrapperNode [2020-08-19 05:59:33,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:33,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:59:33,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:59:33,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:59:33,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... [2020-08-19 05:59:33,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:59:33,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:59:33,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:59:33,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:59:33,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:59:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:59:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:59:33,366 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 05:59:33,367 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-19 05:59:33,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:59:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 05:59:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:59:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 05:59:33,367 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-19 05:59:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:59:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:59:33,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:59:33,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:59:33,563 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:59:33,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:59:33 BoogieIcfgContainer [2020-08-19 05:59:33,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:59:33,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:59:33,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:59:33,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:59:33,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:59:32" (1/3) ... [2020-08-19 05:59:33,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22413375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:59:33, skipping insertion in model container [2020-08-19 05:59:33,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:33" (2/3) ... [2020-08-19 05:59:33,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22413375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:59:33, skipping insertion in model container [2020-08-19 05:59:33,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:59:33" (3/3) ... [2020-08-19 05:59:33,577 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-19 05:59:33,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:59:33,598 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:59:33,615 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:59:33,652 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:59:33,652 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:59:33,652 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:59:33,653 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:59:33,653 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:59:33,653 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:59:33,653 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:59:33,654 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:59:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 05:59:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:59:33,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:33,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:33,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-19 05:59:33,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:33,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027360335] [2020-08-19 05:59:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:33,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:59:34,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027360335] [2020-08-19 05:59:34,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:59:34,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:59:34,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868218891] [2020-08-19 05:59:34,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:59:34,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:59:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:34,051 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-19 05:59:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:34,143 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-19 05:59:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:59:34,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 05:59:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:34,166 INFO L225 Difference]: With dead ends: 40 [2020-08-19 05:59:34,166 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 05:59:34,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 05:59:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 05:59:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 05:59:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 05:59:34,260 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-19 05:59:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:34,261 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 05:59:34,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:59:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 05:59:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:59:34,265 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:34,266 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] [2020-08-19 05:59:34,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:59:34,267 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-19 05:59:34,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:34,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115390720] [2020-08-19 05:59:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:59:34,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115390720] [2020-08-19 05:59:34,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:59:34,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:59:34,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616499575] [2020-08-19 05:59:34,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:59:34,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:59:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:34,479 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-19 05:59:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:34,501 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 05:59:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:59:34,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 05:59:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:34,504 INFO L225 Difference]: With dead ends: 32 [2020-08-19 05:59:34,504 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 05:59:34,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 05:59:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 05:59:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 05:59:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 05:59:34,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-19 05:59:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:34,516 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 05:59:34,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:59:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 05:59:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:59:34,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:34,518 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] [2020-08-19 05:59:34,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:59:34,519 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-19 05:59:34,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:34,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35830558] [2020-08-19 05:59:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:59:34,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35830558] [2020-08-19 05:59:34,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:59:34,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 05:59:34,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058333857] [2020-08-19 05:59:34,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:59:34,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:34,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:59:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:59:34,757 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-19 05:59:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:34,831 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 05:59:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:59:34,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 05:59:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:34,833 INFO L225 Difference]: With dead ends: 48 [2020-08-19 05:59:34,834 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 05:59:34,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:59:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 05:59:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 05:59:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 05:59:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 05:59:34,843 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-19 05:59:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:34,844 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 05:59:34,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:59:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 05:59:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:59:34,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:34,846 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] [2020-08-19 05:59:34,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:59:34,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-19 05:59:34,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:34,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142075154] [2020-08-19 05:59:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:34,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:35,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:59:35,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142075154] [2020-08-19 05:59:35,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:59:35,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:59:35,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681146428] [2020-08-19 05:59:35,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:59:35,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:59:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:35,021 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-19 05:59:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:35,046 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-19 05:59:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:59:35,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-19 05:59:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:35,048 INFO L225 Difference]: With dead ends: 50 [2020-08-19 05:59:35,048 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 05:59:35,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 05:59:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-19 05:59:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 05:59:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-19 05:59:35,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-19 05:59:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:35,070 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-19 05:59:35,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:59:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-19 05:59:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:59:35,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:35,072 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] [2020-08-19 05:59:35,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:59:35,073 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-19 05:59:35,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722332324] [2020-08-19 05:59:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 05:59:35,091 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 05:59:35,091 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 05:59:35,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:59:35,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:59:35 BoogieIcfgContainer [2020-08-19 05:59:35,116 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:59:35,119 INFO L168 Benchmark]: Toolchain (without parser) took 2179.25 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 100.7 MB in the beginning and 201.5 MB in the end (delta: -100.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:59:35,120 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:59:35,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.80 ms. Allocated memory is still 138.9 MB. Free memory was 100.5 MB in the beginning and 90.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:35,122 INFO L168 Benchmark]: Boogie Preprocessor took 112.20 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 180.3 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:35,123 INFO L168 Benchmark]: RCFGBuilder took 272.12 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 167.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:35,124 INFO L168 Benchmark]: TraceAbstraction took 1546.89 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 166.5 MB in the beginning and 201.5 MB in the end (delta: -35.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:59:35,128 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.80 ms. Allocated memory is still 138.9 MB. Free memory was 100.5 MB in the beginning and 90.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.20 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 180.3 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.12 ms. Allocated memory is still 201.3 MB. Free memory was 179.9 MB in the beginning and 167.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1546.89 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 166.5 MB in the beginning and 201.5 MB in the end (delta: -35.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 6 SDslu, 405 SDs, 0 SdLazy, 57 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...