/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=0.4 --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_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:27:48,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:27:48,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:27:48,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:27:48,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:27:49,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:27:49,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:27:49,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:27:49,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:27:49,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:27:49,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:27:49,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:27:49,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:27:49,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:27:49,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:27:49,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:27:49,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:27:49,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:27:49,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:27:49,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:27:49,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:27:49,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:27:49,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:27:49,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:27:49,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:27:49,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:27:49,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:27:49,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:27:49,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:27:49,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:27:49,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:27:49,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:27:49,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:27:49,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:27:49,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:27:49,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:27:49,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:27:49,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:27:49,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:27:49,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:27:49,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:27:49,072 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 05:27:49,114 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:27:49,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:27:49,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:27:49,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:27:49,116 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:27:49,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:27:49,117 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:27:49,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:27:49,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:27:49,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:27:49,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:27:49,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:27:49,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:27:49,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:27:49,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:27:49,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:27:49,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:27:49,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:27:49,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:27:49,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:27:49,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:27:49,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:27:49,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:27:49,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:27:49,121 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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-08-22 05:27:49,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:27:49,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:27:49,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:27:49,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:27:49,510 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:27:49,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-22 05:27:49,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da9d32696/23b81c7ec4d841019695dbd1f2b1d3f7/FLAG66298fd43 [2020-08-22 05:27:50,030 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:27:50,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-22 05:27:50,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da9d32696/23b81c7ec4d841019695dbd1f2b1d3f7/FLAG66298fd43 [2020-08-22 05:27:50,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da9d32696/23b81c7ec4d841019695dbd1f2b1d3f7 [2020-08-22 05:27:50,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:27:50,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:27:50,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:50,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:27:50,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:27:50,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43965ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50, skipping insertion in model container [2020-08-22 05:27:50,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:27:50,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:27:50,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:50,639 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:27:50,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:50,665 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:27:50,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50 WrapperNode [2020-08-22 05:27:50,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:50,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:27:50,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:27:50,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:27:50,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (1/1) ... [2020-08-22 05:27:50,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:27:50,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:27:50,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:27:50,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:27:50,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (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 05:27:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:27:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:27:50,845 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 05:27:50,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:27:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 05:27:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:27:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 05:27:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:27:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:27:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:27:51,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:27:51,002 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 05:27:51,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:51 BoogieIcfgContainer [2020-08-22 05:27:51,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:27:51,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:27:51,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:27:51,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:27:51,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:27:50" (1/3) ... [2020-08-22 05:27:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779bdc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:51, skipping insertion in model container [2020-08-22 05:27:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:50" (2/3) ... [2020-08-22 05:27:51,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779bdc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:51, skipping insertion in model container [2020-08-22 05:27:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:51" (3/3) ... [2020-08-22 05:27:51,014 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-22 05:27:51,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:27:51,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:27:51,047 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:27:51,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:27:51,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:27:51,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:27:51,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:27:51,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:27:51,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:27:51,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:27:51,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:27:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 05:27:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 05:27:51,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:51,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:51,103 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 05:27:51,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:51,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177071083] [2020-08-22 05:27:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,492 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 05:27:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177071083] [2020-08-22 05:27:51,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:27:51,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 05:27:51,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142023142] [2020-08-22 05:27:51,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:27:51,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:27:51,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:27:51,518 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 05:27:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:51,583 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 05:27:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:27:51,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 05:27:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:51,596 INFO L225 Difference]: With dead ends: 32 [2020-08-22 05:27:51,597 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 05:27:51,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:27:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 05:27:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 05:27:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 05:27:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 05:27:51,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 05:27:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:51,641 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 05:27:51,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:27:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 05:27:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:27:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:51,643 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 05:27:51,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:27:51,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 05:27:51,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:51,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133408565] [2020-08-22 05:27:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:51,830 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 05:27:51,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133408565] [2020-08-22 05:27:51,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:51,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:27:51,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898813133] [2020-08-22 05:27:51,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:27:51,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:27:51,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:27:51,835 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 05:27:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:51,865 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 05:27:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:27:51,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 05:27:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:51,867 INFO L225 Difference]: With dead ends: 25 [2020-08-22 05:27:51,867 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 05:27:51,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:27:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 05:27:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 05:27:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 05:27:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 05:27:51,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 05:27:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:51,876 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 05:27:51,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:27:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 05:27:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:27:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:51,878 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 05:27:51,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:27:51,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 05:27:51,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:51,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630459262] [2020-08-22 05:27:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,150 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 05:27:52,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630459262] [2020-08-22 05:27:52,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:52,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:27:52,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3099554] [2020-08-22 05:27:52,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:27:52,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:27:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:27:52,154 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 05:27:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:52,203 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 05:27:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:27:52,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 05:27:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:52,206 INFO L225 Difference]: With dead ends: 28 [2020-08-22 05:27:52,206 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 05:27:52,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:27:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 05:27:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 05:27:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 05:27:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 05:27:52,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 05:27:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:52,215 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 05:27:52,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:27:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 05:27:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:27:52,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:52,217 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 05:27:52,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:27:52,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 05:27:52,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:52,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061063899] [2020-08-22 05:27:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,492 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 05:27:52,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061063899] [2020-08-22 05:27:52,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:52,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:27:52,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15371974] [2020-08-22 05:27:52,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:27:52,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:27:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:27:52,495 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-22 05:27:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:52,553 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 05:27:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:27:52,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 05:27:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:52,555 INFO L225 Difference]: With dead ends: 31 [2020-08-22 05:27:52,555 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 05:27:52,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:27:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 05:27:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 05:27:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 05:27:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 05:27:52,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 05:27:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:52,564 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 05:27:52,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:27:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 05:27:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 05:27:52,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:52,566 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 05:27:52,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:27:52,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 05:27:52,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:52,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742085674] [2020-08-22 05:27:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:52,887 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 05:27:52,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742085674] [2020-08-22 05:27:52,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:52,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:27:52,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437340773] [2020-08-22 05:27:52,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:27:52,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:27:52,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:27:52,890 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-22 05:27:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:52,966 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 05:27:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 05:27:52,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 05:27:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:52,968 INFO L225 Difference]: With dead ends: 34 [2020-08-22 05:27:52,968 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 05:27:52,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:27:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 05:27:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 05:27:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 05:27:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 05:27:52,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 05:27:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:52,976 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 05:27:52,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:27:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 05:27:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 05:27:52,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:52,978 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 05:27:52,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:27:52,979 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 05:27:52,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:52,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650588461] [2020-08-22 05:27:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,327 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 05:27:53,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650588461] [2020-08-22 05:27:53,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:53,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 05:27:53,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919330750] [2020-08-22 05:27:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 05:27:53,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 05:27:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:27:53,330 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-22 05:27:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:53,422 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 05:27:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:27:53,422 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-22 05:27:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:53,423 INFO L225 Difference]: With dead ends: 37 [2020-08-22 05:27:53,424 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 05:27:53,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:27:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 05:27:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 05:27:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 05:27:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 05:27:53,430 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 05:27:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:53,430 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 05:27:53,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 05:27:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 05:27:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 05:27:53,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:53,432 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 05:27:53,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:27:53,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 05:27:53,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:53,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970706808] [2020-08-22 05:27:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:53,826 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 05:27:53,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970706808] [2020-08-22 05:27:53,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:53,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 05:27:53,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457535283] [2020-08-22 05:27:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 05:27:53,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 05:27:53,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 05:27:53,829 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-22 05:27:54,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:54,003 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 05:27:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 05:27:54,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-22 05:27:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:54,005 INFO L225 Difference]: With dead ends: 40 [2020-08-22 05:27:54,005 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 05:27:54,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 05:27:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 05:27:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 05:27:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 05:27:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 05:27:54,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 05:27:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:54,020 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 05:27:54,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 05:27:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 05:27:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 05:27:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:54,025 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 05:27:54,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:27:54,026 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:54,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 05:27:54,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:54,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74474017] [2020-08-22 05:27:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,497 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 05:27:54,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74474017] [2020-08-22 05:27:54,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:54,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 05:27:54,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031284687] [2020-08-22 05:27:54,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 05:27:54,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 05:27:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:27:54,500 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-22 05:27:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:54,681 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 05:27:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 05:27:54,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 05:27:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:54,684 INFO L225 Difference]: With dead ends: 43 [2020-08-22 05:27:54,684 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 05:27:54,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:27:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 05:27:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 05:27:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 05:27:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 05:27:54,692 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 05:27:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:54,692 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 05:27:54,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 05:27:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 05:27:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 05:27:54,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:54,694 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 05:27:54,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:27:54,695 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 05:27:54,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:54,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740645415] [2020-08-22 05:27:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:54,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,299 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 05:27:55,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740645415] [2020-08-22 05:27:55,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:55,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 05:27:55,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847531282] [2020-08-22 05:27:55,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 05:27:55,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 05:27:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:27:55,307 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-22 05:27:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:55,485 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 05:27:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 05:27:55,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-22 05:27:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:55,487 INFO L225 Difference]: With dead ends: 46 [2020-08-22 05:27:55,487 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 05:27:55,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 05:27:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 05:27:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 05:27:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 05:27:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 05:27:55,503 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 05:27:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:55,504 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 05:27:55,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 05:27:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 05:27:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 05:27:55,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:55,507 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 05:27:55,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:27:55,508 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:55,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 05:27:55,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:55,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004503398] [2020-08-22 05:27:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:27:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:27:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:56,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:27:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:27:56,171 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 05:27:56,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004503398] [2020-08-22 05:27:56,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:27:56,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 05:27:56,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918344015] [2020-08-22 05:27:56,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 05:27:56,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:27:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 05:27:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:27:56,175 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-22 05:27:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:27:56,442 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 05:27:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 05:27:56,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-22 05:27:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:27:56,445 INFO L225 Difference]: With dead ends: 49 [2020-08-22 05:27:56,445 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 05:27:56,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 05:27:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 05:27:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 05:27:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 05:27:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 05:27:56,463 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 05:27:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:27:56,465 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 05:27:56,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 05:27:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 05:27:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 05:27:56,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:56,467 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 05:27:56,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:27:56,472 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 05:27:56,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:56,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661831954] [2020-08-22 05:27:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:27:56,557 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:27:56,557 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:27:56,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:27:56,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:27:56 BoogieIcfgContainer [2020-08-22 05:27:56,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:27:56,608 INFO L168 Benchmark]: Toolchain (without parser) took 6156.97 ms. Allocated memory was 149.9 MB in the beginning and 293.1 MB in the end (delta: 143.1 MB). Free memory was 105.8 MB in the beginning and 259.0 MB in the end (delta: -153.2 MB). Peak memory consumption was 126.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,609 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 149.9 MB. Free memory was 124.4 MB in the beginning and 124.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,610 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.34 ms. Allocated memory is still 149.9 MB. Free memory was 105.6 MB in the beginning and 96.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,613 INFO L168 Benchmark]: Boogie Preprocessor took 27.07 ms. Allocated memory is still 149.9 MB. Free memory was 96.3 MB in the beginning and 95.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,616 INFO L168 Benchmark]: RCFGBuilder took 312.54 ms. Allocated memory was 149.9 MB in the beginning and 204.5 MB in the end (delta: 54.5 MB). Free memory was 95.0 MB in the beginning and 173.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,617 INFO L168 Benchmark]: TraceAbstraction took 5597.89 ms. Allocated memory was 204.5 MB in the beginning and 293.1 MB in the end (delta: 88.6 MB). Free memory was 172.4 MB in the beginning and 259.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 138.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:27:56,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 149.9 MB. Free memory was 124.4 MB in the beginning and 124.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 214.34 ms. Allocated memory is still 149.9 MB. Free memory was 105.6 MB in the beginning and 96.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.07 ms. Allocated memory is still 149.9 MB. Free memory was 96.3 MB in the beginning and 95.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.54 ms. Allocated memory was 149.9 MB in the beginning and 204.5 MB in the end (delta: 54.5 MB). Free memory was 95.0 MB in the beginning and 173.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5597.89 ms. Allocated memory was 204.5 MB in the beginning and 293.1 MB in the end (delta: 88.6 MB). Free memory was 172.4 MB in the beginning and 259.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 138.0 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] unsigned int input = __VERIFIER_nondet_uint(); [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] unsigned 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: 5.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2772 SDs, 0 SdLazy, 1181 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 69600 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...