/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=0.5 -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 06:48:05,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:48:05,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:48:05,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:48:05,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:48:05,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:48:05,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:48:05,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:48:05,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:48:05,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:48:05,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:48:05,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:48:05,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:48:05,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:48:05,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:48:05,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:48:05,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:48:05,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:48:05,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:48:05,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:48:05,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:48:05,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:48:05,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:48:05,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:48:05,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:48:05,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:48:05,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:48:05,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:48:05,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:48:05,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:48:05,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:48:05,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:48:05,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:48:05,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:48:05,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:48:05,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:48:05,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:48:05,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:48:05,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:48:05,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:48:05,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:48:05,631 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 06:48:05,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:48:05,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:48:05,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:48:05,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:48:05,656 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:48:05,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:48:05,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:48:05,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:48:05,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:48:05,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:48:05,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:48:05,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:48:05,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:48:05,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:48:05,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:48:05,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:48:05,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:48:05,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:48:05,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:48:05,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:48:05,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:48:05,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:48:05,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:48:05,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:48:05,661 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=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:48:05,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:48:05,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:48:05,970 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:48:05,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:48:05,972 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:48:05,972 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-19 06:48:06,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c76f8da/fda3dd13d55e4da88efeea0843a7ba29/FLAG07d103d87 [2020-08-19 06:48:06,465 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:48:06,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-19 06:48:06,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c76f8da/fda3dd13d55e4da88efeea0843a7ba29/FLAG07d103d87 [2020-08-19 06:48:06,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9c76f8da/fda3dd13d55e4da88efeea0843a7ba29 [2020-08-19 06:48:06,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:48:06,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:48:06,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:06,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:48:06,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:48:06,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:06" (1/1) ... [2020-08-19 06:48:06,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1acfe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:06, skipping insertion in model container [2020-08-19 06:48:06,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:48:06" (1/1) ... [2020-08-19 06:48:06,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:48:06,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:48:07,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:07,069 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:48:07,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:48:07,095 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:48:07,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07 WrapperNode [2020-08-19 06:48:07,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:48:07,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:48:07,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:48:07,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:48:07,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (1/1) ... [2020-08-19 06:48:07,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:48:07,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:48:07,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:48:07,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:48:07,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (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 06:48:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:48:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:48:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 06:48:07,265 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-19 06:48:07,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:48:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 06:48:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:48:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 06:48:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-19 06:48:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:48:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:48:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:48:07,489 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:48:07,489 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:48:07,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:07 BoogieIcfgContainer [2020-08-19 06:48:07,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:48:07,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:48:07,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:48:07,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:48:07,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:48:06" (1/3) ... [2020-08-19 06:48:07,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f43f952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:07, skipping insertion in model container [2020-08-19 06:48:07,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:48:07" (2/3) ... [2020-08-19 06:48:07,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f43f952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:48:07, skipping insertion in model container [2020-08-19 06:48:07,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:48:07" (3/3) ... [2020-08-19 06:48:07,528 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-19 06:48:07,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:48:07,564 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:48:07,581 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:48:07,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:48:07,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:48:07,605 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:48:07,605 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:48:07,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:48:07,606 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:48:07,606 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:48:07,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:48:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 06:48:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:48:07,630 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:07,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:48:07,631 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-19 06:48:07,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:07,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512792465] [2020-08-19 06:48:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:07,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:07,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:07,903 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 06:48:07,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512792465] [2020-08-19 06:48:07,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:07,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:07,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275277307] [2020-08-19 06:48:07,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:07,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:07,931 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-19 06:48:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:08,003 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-19 06:48:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:08,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:48:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:08,015 INFO L225 Difference]: With dead ends: 40 [2020-08-19 06:48:08,015 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 06:48:08,020 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 06:48:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 06:48:08,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 06:48:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 06:48:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 06:48:08,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-19 06:48:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:08,065 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 06:48:08,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 06:48:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:48:08,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:08,068 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 06:48:08,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:48:08,069 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-19 06:48:08,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:08,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5556944] [2020-08-19 06:48:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,225 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 06:48:08,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5556944] [2020-08-19 06:48:08,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:08,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:08,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868982148] [2020-08-19 06:48:08,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:08,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:08,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:08,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:08,234 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-19 06:48:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:08,255 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 06:48:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:08,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 06:48:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:08,258 INFO L225 Difference]: With dead ends: 32 [2020-08-19 06:48:08,258 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 06:48:08,259 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 06:48:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 06:48:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 06:48:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 06:48:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 06:48:08,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-19 06:48:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:08,268 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 06:48:08,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 06:48:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 06:48:08,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:08,270 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 06:48:08,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:48:08,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-19 06:48:08,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:08,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067222307] [2020-08-19 06:48:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,454 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 06:48:08,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067222307] [2020-08-19 06:48:08,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:08,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:48:08,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007198930] [2020-08-19 06:48:08,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:48:08,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:48:08,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:48:08,457 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-19 06:48:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:08,526 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 06:48:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:48:08,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 06:48:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:08,529 INFO L225 Difference]: With dead ends: 48 [2020-08-19 06:48:08,529 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 06:48:08,530 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 06:48:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 06:48:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 06:48:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:48:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 06:48:08,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-19 06:48:08,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:08,539 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 06:48:08,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:48:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 06:48:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:48:08,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:08,541 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 06:48:08,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:48:08,542 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-19 06:48:08,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:08,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512562331] [2020-08-19 06:48:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:48:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:48:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 06:48:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:48:08,746 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 06:48:08,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512562331] [2020-08-19 06:48:08,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:48:08,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:48:08,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098521387] [2020-08-19 06:48:08,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:48:08,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:48:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:48:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:48:08,752 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-19 06:48:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:48:08,792 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-19 06:48:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:48:08,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-19 06:48:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:48:08,797 INFO L225 Difference]: With dead ends: 50 [2020-08-19 06:48:08,816 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 06:48:08,817 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 06:48:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 06:48:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-19 06:48:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 06:48:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-19 06:48:08,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-19 06:48:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:48:08,838 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-19 06:48:08,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:48:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-19 06:48:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:48:08,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:48:08,843 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 06:48:08,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:48:08,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:48:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:48:08,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-19 06:48:08,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:48:08,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105046432] [2020-08-19 06:48:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:48:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:48:08,894 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:48:08,895 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:48:08,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:48:08,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:48:08 BoogieIcfgContainer [2020-08-19 06:48:08,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:48:08,938 INFO L168 Benchmark]: Toolchain (without parser) took 2075.58 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.8 MB in the beginning and 203.2 MB in the end (delta: -100.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:48:08,939 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:48:08,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:08,943 INFO L168 Benchmark]: Boogie Preprocessor took 107.23 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 181.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:08,950 INFO L168 Benchmark]: RCFGBuilder took 293.50 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:48:08,952 INFO L168 Benchmark]: TraceAbstraction took 1432.36 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 168.0 MB in the beginning and 203.2 MB in the end (delta: -35.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:48:08,964 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.36 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.23 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 181.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.50 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1432.36 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 168.0 MB in the beginning and 203.2 MB in the end (delta: -35.1 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: 1.3s, 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: 0.0s 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...