/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:08:17,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:08:17,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:08:18,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:08:18,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:08:18,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:08:18,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:08:18,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:08:18,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:08:18,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:08:18,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:08:18,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:08:18,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:08:18,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:08:18,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:08:18,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:08:18,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:08:18,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:08:18,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:08:18,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:08:18,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:08:18,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:08:18,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:08:18,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:08:18,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:08:18,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:08:18,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:08:18,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:08:18,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:08:18,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:08:18,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:08:18,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:08:18,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:08:18,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:08:18,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:08:18,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:08:18,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:08:18,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:08:18,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:08:18,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:08:18,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:08:18,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:08:18,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:08:18,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:08:18,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:08:18,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:08:18,132 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:08:18,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:08:18,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:08:18,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:08:18,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:08:18,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:08:18,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:08:18,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:08:18,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:08:18,136 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:08:18,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:08:18,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:08:18,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:08:18,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:08:18,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:08:18,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:08:18,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:08:18,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:18,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:08:18,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:08:18,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:08:18,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:08:18,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:08:18,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:08:18,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:08:18,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:08:18,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:08:18,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:08:18,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:08:18,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:08:18,457 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:08:18,458 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-19 01:08:18,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4274a660/9fc2a77b8dcc4c60ab7cd6d6b4bd647d/FLAG59f92fb5e [2020-08-19 01:08:19,007 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:08:19,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-19 01:08:19,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4274a660/9fc2a77b8dcc4c60ab7cd6d6b4bd647d/FLAG59f92fb5e [2020-08-19 01:08:19,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4274a660/9fc2a77b8dcc4c60ab7cd6d6b4bd647d [2020-08-19 01:08:19,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:08:19,350 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:08:19,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:19,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:08:19,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:08:19,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704da3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19, skipping insertion in model container [2020-08-19 01:08:19,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:08:19,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:08:19,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:19,556 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:08:19,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:19,588 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:08:19,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19 WrapperNode [2020-08-19 01:08:19,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:19,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:08:19,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:08:19,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:08:19,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:08:19,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:08:19,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:08:19,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:08:19,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:08:19,747 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 01:08:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-19 01:08:19,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:08:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 01:08:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:08:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 01:08:19,748 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-19 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:08:19,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:08:19,949 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:08:19,949 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 01:08:19,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:19 BoogieIcfgContainer [2020-08-19 01:08:19,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:08:19,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:08:19,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:08:19,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:08:19,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:08:19" (1/3) ... [2020-08-19 01:08:19,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dedc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:19, skipping insertion in model container [2020-08-19 01:08:19,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19" (2/3) ... [2020-08-19 01:08:19,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dedc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:19, skipping insertion in model container [2020-08-19 01:08:19,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:19" (3/3) ... [2020-08-19 01:08:19,963 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-19 01:08:19,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:08:19,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:08:19,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:08:20,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:08:20,015 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:08:20,015 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:08:20,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:08:20,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:08:20,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:08:20,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:08:20,016 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:08:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 01:08:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 01:08:20,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:20,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:20,039 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-19 01:08:20,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:20,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620698401] [2020-08-19 01:08:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,444 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2020-08-19 01:08:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:20,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620698401] [2020-08-19 01:08:20,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:20,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:20,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795700475] [2020-08-19 01:08:20,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:20,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:20,511 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-19 01:08:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:20,568 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-19 01:08:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:20,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 01:08:20,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:20,582 INFO L225 Difference]: With dead ends: 40 [2020-08-19 01:08:20,583 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 01:08:20,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 01:08:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 01:08:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 01:08:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 01:08:20,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-19 01:08:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:20,637 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 01:08:20,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 01:08:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:08:20,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:20,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:20,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:08:20,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-19 01:08:20,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:20,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950854288] [2020-08-19 01:08:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:20,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950854288] [2020-08-19 01:08:20,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:20,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:20,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960037569] [2020-08-19 01:08:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:20,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:20,836 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-19 01:08:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:20,881 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 01:08:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:20,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 01:08:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:20,883 INFO L225 Difference]: With dead ends: 32 [2020-08-19 01:08:20,883 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 01:08:20,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 01:08:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 01:08:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 01:08:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 01:08:20,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-19 01:08:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:20,901 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 01:08:20,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 01:08:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:08:20,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:20,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:20,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:08:20,906 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-19 01:08:20,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:20,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251760182] [2020-08-19 01:08:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:21,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251760182] [2020-08-19 01:08:21,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:21,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 01:08:21,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882968691] [2020-08-19 01:08:21,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:08:21,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:08:21,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:08:21,158 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-19 01:08:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,254 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 01:08:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:08:21,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 01:08:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,256 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:08:21,256 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 01:08:21,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:08:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 01:08:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 01:08:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 01:08:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 01:08:21,266 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-19 01:08:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,266 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 01:08:21,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:08:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 01:08:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:08:21,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:21,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:08:21,269 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-19 01:08:21,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861696242] [2020-08-19 01:08:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:08:21,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861696242] [2020-08-19 01:08:21,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:21,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:21,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746197408] [2020-08-19 01:08:21,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:21,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:21,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:21,415 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-19 01:08:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,462 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-19 01:08:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:21,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-19 01:08:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,464 INFO L225 Difference]: With dead ends: 50 [2020-08-19 01:08:21,464 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 01:08:21,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 01:08:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-19 01:08:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 01:08:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-19 01:08:21,473 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-19 01:08:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,473 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-19 01:08:21,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-19 01:08:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:08:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:21,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:08:21,475 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-19 01:08:21,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382470355] [2020-08-19 01:08:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:08:21,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382470355] [2020-08-19 01:08:21,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:21,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 01:08:21,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483229807] [2020-08-19 01:08:21,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 01:08:21,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 01:08:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:08:21,689 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-19 01:08:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,792 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-19 01:08:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:08:21,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-19 01:08:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,794 INFO L225 Difference]: With dead ends: 64 [2020-08-19 01:08:21,794 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 01:08:21,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-19 01:08:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 01:08:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-19 01:08:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 01:08:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-19 01:08:21,806 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-19 01:08:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,807 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-19 01:08:21,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 01:08:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-19 01:08:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:08:21,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:21,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:08:21,813 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-19 01:08:21,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315176055] [2020-08-19 01:08:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 01:08:22,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315176055] [2020-08-19 01:08:22,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:22,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:08:22,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344838553] [2020-08-19 01:08:22,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:08:22,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:08:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:22,218 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-19 01:08:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:22,387 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-19 01:08:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:08:22,388 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-19 01:08:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:22,389 INFO L225 Difference]: With dead ends: 74 [2020-08-19 01:08:22,389 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 01:08:22,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:08:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 01:08:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-19 01:08:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 01:08:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-19 01:08:22,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-19 01:08:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:22,401 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-19 01:08:22,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:08:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-19 01:08:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 01:08:22,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:22,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:22,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:08:22,403 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-19 01:08:22,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424986590] [2020-08-19 01:08:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-19 01:08:22,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424986590] [2020-08-19 01:08:22,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:22,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:08:22,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914623746] [2020-08-19 01:08:22,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:08:22,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:08:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:22,729 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-19 01:08:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:22,883 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-19 01:08:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:08:22,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-19 01:08:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:22,886 INFO L225 Difference]: With dead ends: 78 [2020-08-19 01:08:22,886 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 01:08:22,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:08:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 01:08:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-19 01:08:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 01:08:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-19 01:08:22,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-19 01:08:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:22,895 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-19 01:08:22,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:08:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-19 01:08:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 01:08:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:22,897 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:22,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:08:22,897 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-19 01:08:22,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:22,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954023808] [2020-08-19 01:08:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 01:08:23,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954023808] [2020-08-19 01:08:23,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:23,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:08:23,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89855584] [2020-08-19 01:08:23,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:08:23,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:08:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:23,206 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-19 01:08:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:23,348 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-19 01:08:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:08:23,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-19 01:08:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:23,349 INFO L225 Difference]: With dead ends: 66 [2020-08-19 01:08:23,349 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:08:23,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:08:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:08:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:08:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:08:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:08:23,352 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-19 01:08:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:23,352 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:08:23,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:08:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:08:23,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:08:23,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:08:23,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:08:23,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:08:23,378 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:08:23,378 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-19 01:08:23,378 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-19 01:08:23,378 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-19 01:08:23,379 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-19 01:08:23,379 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-19 01:08:23,379 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-19 01:08:23,379 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-19 01:08:23,379 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:08:23,379 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:08:23,379 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:08:23,379 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:08:23,380 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-19 01:08:23,380 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-19 01:08:23,380 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-19 01:08:23,380 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-19 01:08:23,380 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-19 01:08:23,380 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-19 01:08:23,380 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-19 01:08:23,381 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-19 01:08:23,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:08:23 BoogieIcfgContainer [2020-08-19 01:08:23,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:08:23,390 INFO L168 Benchmark]: Toolchain (without parser) took 4040.13 ms. Allocated memory was 140.0 MB in the beginning and 244.8 MB in the end (delta: 104.9 MB). Free memory was 103.4 MB in the beginning and 96.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 111.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:23,391 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:08:23,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.40 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:23,392 INFO L168 Benchmark]: Boogie Preprocessor took 97.34 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.3 MB in the beginning and 180.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:23,393 INFO L168 Benchmark]: RCFGBuilder took 267.07 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:23,394 INFO L168 Benchmark]: TraceAbstraction took 3432.40 ms. Allocated memory was 201.9 MB in the beginning and 244.8 MB in the end (delta: 43.0 MB). Free memory was 167.7 MB in the beginning and 96.6 MB in the end (delta: 71.1 MB). Peak memory consumption was 114.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:23,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.40 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 97.34 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.3 MB in the beginning and 180.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.07 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 167.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3432.40 ms. Allocated memory was 201.9 MB in the beginning and 244.8 MB in the end (delta: 43.0 MB). Free memory was 167.7 MB in the beginning and 96.6 MB in the end (delta: 71.1 MB). Peak memory consumption was 114.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 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 correct! Received shutdown request...