/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:39:05,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:39:05,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:39:05,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:39:05,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:39:05,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:39:05,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:39:05,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:39:05,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:39:05,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:39:05,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:39:05,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:39:05,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:39:05,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:39:05,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:39:05,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:39:05,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:39:05,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:39:05,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:39:05,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:39:05,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:39:05,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:39:05,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:39:05,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:39:05,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:39:05,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:39:05,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:39:05,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:39:05,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:39:05,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:39:05,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:39:05,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:39:05,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:39:05,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:39:05,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:39:05,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:39:05,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:39:05,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:39:05,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:39:05,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:39:05,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:39:05,631 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 [2020-08-22 04:39:05,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:39:05,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:39:05,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:39:05,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:39:05,690 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:39:05,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:39:05,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:39:05,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:39:05,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:39:05,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:39:05,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:39:05,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:39:05,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:39:05,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:39:05,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:39:05,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:39:05,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:39:05,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:39:05,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:39:05,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:39:05,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:39:05,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:39:05,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:39:05,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:39:05,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:39:05,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:39:05,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:39:05,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:39:05,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:39:05,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:39:06,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:39:06,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:39:06,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:39:06,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:39:06,034 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:39:06,035 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 04:39:06,097 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9964f4c45/b206e9b95b6f4d0d9a71d163599996e1/FLAG45258b1f1 [2020-08-22 04:39:06,580 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:39:06,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 04:39:06,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9964f4c45/b206e9b95b6f4d0d9a71d163599996e1/FLAG45258b1f1 [2020-08-22 04:39:06,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9964f4c45/b206e9b95b6f4d0d9a71d163599996e1 [2020-08-22 04:39:07,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:39:07,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:39:07,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:07,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:39:07,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:39:07,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:06" (1/1) ... [2020-08-22 04:39:07,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369e4506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07, skipping insertion in model container [2020-08-22 04:39:07,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:06" (1/1) ... [2020-08-22 04:39:07,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:39:07,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:39:07,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:07,219 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:39:07,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:39:07,242 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:39:07,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07 WrapperNode [2020-08-22 04:39:07,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:39:07,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:39:07,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:39:07,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:39:07,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (1/1) ... [2020-08-22 04:39:07,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:39:07,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:39:07,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:39:07,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:39:07,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (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 [2020-08-22 04:39:07,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:39:07,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:39:07,418 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 04:39:07,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:39:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:39:07,589 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:39:07,590 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:39:07,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:07 BoogieIcfgContainer [2020-08-22 04:39:07,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:39:07,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:39:07,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:39:07,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:39:07,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:39:06" (1/3) ... [2020-08-22 04:39:07,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c6fe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:07, skipping insertion in model container [2020-08-22 04:39:07,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:07" (2/3) ... [2020-08-22 04:39:07,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c6fe3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:07, skipping insertion in model container [2020-08-22 04:39:07,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:07" (3/3) ... [2020-08-22 04:39:07,604 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-22 04:39:07,615 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:39:07,622 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:39:07,636 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:39:07,662 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:39:07,662 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:39:07,662 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:39:07,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:39:07,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:39:07,662 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:39:07,663 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:39:07,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:39:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 04:39:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:39:07,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:07,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:07,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 04:39:07,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:07,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57185456] [2020-08-22 04:39:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:07,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:07,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:39:07,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57185456] [2020-08-22 04:39:07,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:39:07,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:39:07,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055731698] [2020-08-22 04:39:07,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:39:07,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:07,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:39:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:39:07,974 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 04:39:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:08,049 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 04:39:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:39:08,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 04:39:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:08,062 INFO L225 Difference]: With dead ends: 30 [2020-08-22 04:39:08,062 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 04:39:08,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:39:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 04:39:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 04:39:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 04:39:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 04:39:08,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 04:39:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:08,106 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 04:39:08,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:39:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 04:39:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:39:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:08,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:08,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:39:08,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 04:39:08,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:08,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252861957] [2020-08-22 04:39:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 04:39:08,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252861957] [2020-08-22 04:39:08,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:08,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:39:08,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315640684] [2020-08-22 04:39:08,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:39:08,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:08,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:39:08,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:39:08,253 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 04:39:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:08,329 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 04:39:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:39:08,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 04:39:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:08,331 INFO L225 Difference]: With dead ends: 25 [2020-08-22 04:39:08,331 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 04:39:08,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:39:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 04:39:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 04:39:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 04:39:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 04:39:08,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 04:39:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:08,340 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 04:39:08,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:39:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 04:39:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:39:08,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:08,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:08,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:39:08,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 04:39:08,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:08,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798228491] [2020-08-22 04:39:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 04:39:08,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798228491] [2020-08-22 04:39:08,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:08,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:39:08,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782290021] [2020-08-22 04:39:08,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:39:08,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:39:08,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:39:08,525 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 04:39:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:08,621 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 04:39:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:39:08,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 04:39:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:08,624 INFO L225 Difference]: With dead ends: 28 [2020-08-22 04:39:08,624 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 04:39:08,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:39:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 04:39:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 04:39:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 04:39:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 04:39:08,632 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 04:39:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:08,633 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 04:39:08,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:39:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 04:39:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 04:39:08,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:08,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:08,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:39:08,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 04:39:08,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:08,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295632417] [2020-08-22 04:39:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 04:39:08,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295632417] [2020-08-22 04:39:08,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:08,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:39:08,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122493293] [2020-08-22 04:39:08,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:39:08,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:39:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:39:08,821 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 04:39:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:08,911 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 04:39:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:39:08,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 04:39:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:08,913 INFO L225 Difference]: With dead ends: 31 [2020-08-22 04:39:08,913 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 04:39:08,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:39:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 04:39:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 04:39:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 04:39:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 04:39:08,921 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 04:39:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:08,921 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 04:39:08,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:39:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 04:39:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 04:39:08,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:08,923 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:08,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:39:08,924 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 04:39:08,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:08,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369854986] [2020-08-22 04:39:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:08,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 04:39:09,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369854986] [2020-08-22 04:39:09,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:09,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:39:09,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912571828] [2020-08-22 04:39:09,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:39:09,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:39:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:39:09,144 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 04:39:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:09,228 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 04:39:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:39:09,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 04:39:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:09,230 INFO L225 Difference]: With dead ends: 34 [2020-08-22 04:39:09,230 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 04:39:09,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 04:39:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 04:39:09,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:39:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 04:39:09,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 04:39:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:09,238 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 04:39:09,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:39:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 04:39:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 04:39:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:09,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:09,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:39:09,241 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 04:39:09,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:09,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802705612] [2020-08-22 04:39:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 04:39:09,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802705612] [2020-08-22 04:39:09,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:09,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:39:09,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825489748] [2020-08-22 04:39:09,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:39:09,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:09,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:39:09,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:39:09,423 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 04:39:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:09,518 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 04:39:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:39:09,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 04:39:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:09,519 INFO L225 Difference]: With dead ends: 37 [2020-08-22 04:39:09,520 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 04:39:09,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:39:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 04:39:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 04:39:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 04:39:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 04:39:09,527 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 04:39:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:09,528 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 04:39:09,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:39:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 04:39:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 04:39:09,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:09,533 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:09,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:39:09,533 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 04:39:09,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:09,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919027930] [2020-08-22 04:39:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 04:39:09,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919027930] [2020-08-22 04:39:09,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:09,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:39:09,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497935081] [2020-08-22 04:39:09,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:39:09,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:39:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:39:09,741 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 04:39:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:09,849 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 04:39:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:39:09,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 04:39:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:09,851 INFO L225 Difference]: With dead ends: 40 [2020-08-22 04:39:09,852 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 04:39:09,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:39:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 04:39:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 04:39:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 04:39:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 04:39:09,859 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 04:39:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:09,859 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 04:39:09,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:39:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 04:39:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 04:39:09,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:09,861 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:09,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:39:09,862 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 04:39:09,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:09,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811992948] [2020-08-22 04:39:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 04:39:10,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811992948] [2020-08-22 04:39:10,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:10,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:39:10,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207516082] [2020-08-22 04:39:10,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:39:10,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:39:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:39:10,095 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 04:39:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:10,233 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 04:39:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:39:10,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 04:39:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:10,235 INFO L225 Difference]: With dead ends: 43 [2020-08-22 04:39:10,235 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 04:39:10,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:39:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 04:39:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 04:39:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 04:39:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 04:39:10,243 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 04:39:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:10,243 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 04:39:10,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:39:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 04:39:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 04:39:10,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:10,245 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:10,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:39:10,246 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 04:39:10,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:10,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879938844] [2020-08-22 04:39:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 04:39:10,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879938844] [2020-08-22 04:39:10,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:10,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:39:10,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957300545] [2020-08-22 04:39:10,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:39:10,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:10,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:39:10,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:39:10,511 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 04:39:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:10,652 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 04:39:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:39:10,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 04:39:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:10,654 INFO L225 Difference]: With dead ends: 46 [2020-08-22 04:39:10,654 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 04:39:10,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:39:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 04:39:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 04:39:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 04:39:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 04:39:10,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 04:39:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:10,663 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 04:39:10,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:39:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 04:39:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 04:39:10,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:10,665 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:10,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:39:10,666 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 04:39:10,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:10,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509476116] [2020-08-22 04:39:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:39:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:39:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 04:39:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:39:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 04:39:10,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509476116] [2020-08-22 04:39:10,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:39:10,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:39:10,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065967874] [2020-08-22 04:39:10,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:39:10,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:39:10,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:39:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:39:10,988 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 04:39:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:39:11,144 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 04:39:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:39:11,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 04:39:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:39:11,146 INFO L225 Difference]: With dead ends: 49 [2020-08-22 04:39:11,146 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 04:39:11,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:39:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 04:39:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 04:39:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 04:39:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 04:39:11,154 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 04:39:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:39:11,154 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 04:39:11,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:39:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 04:39:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 04:39:11,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:39:11,156 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:39:11,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:39:11,157 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:39:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:39:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 04:39:11,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:39:11,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415117254] [2020-08-22 04:39:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:39:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 04:39:11,186 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 04:39:11,186 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 04:39:11,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:39:11,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:11 BoogieIcfgContainer [2020-08-22 04:39:11,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:39:11,217 INFO L168 Benchmark]: Toolchain (without parser) took 4209.02 ms. Allocated memory was 139.5 MB in the beginning and 288.4 MB in the end (delta: 148.9 MB). Free memory was 102.4 MB in the beginning and 257.9 MB in the end (delta: -155.5 MB). Peak memory consumption was 115.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:11,218 INFO L168 Benchmark]: CDTParser took 0.24 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. [2020-08-22 04:39:11,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.61 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:11,220 INFO L168 Benchmark]: Boogie Preprocessor took 103.96 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:11,220 INFO L168 Benchmark]: RCFGBuilder took 246.82 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:11,221 INFO L168 Benchmark]: TraceAbstraction took 3618.29 ms. Allocated memory was 201.9 MB in the beginning and 288.4 MB in the end (delta: 86.5 MB). Free memory was 168.7 MB in the beginning and 257.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. [2020-08-22 04:39:11,225 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 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 234.61 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.96 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.82 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3618.29 ms. Allocated memory was 201.9 MB in the beginning and 288.4 MB in the end (delta: 86.5 MB). Free memory was 168.7 MB in the beginning and 257.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 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...