/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:38:39,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:38:39,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:38:39,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:38:39,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:38:39,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:38:39,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:38:39,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:38:39,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:38:39,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:38:39,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:38:39,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:38:39,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:38:39,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:38:39,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:38:39,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:38:39,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:38:39,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:38:39,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:38:39,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:38:39,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:38:39,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:38:39,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:38:39,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:38:39,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:38:39,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:38:39,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:38:39,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:38:39,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:38:39,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:38:39,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:38:39,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:38:39,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:38:39,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:38:39,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:38:39,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:38:39,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:38:39,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:38:39,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:38:39,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:38:39,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:38:39,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:38:40,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:38:40,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:38:40,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:38:40,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:38:40,003 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:38:40,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:38:40,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:38:40,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:38:40,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:38:40,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:38:40,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:38:40,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:38:40,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:38:40,007 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:38:40,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:38:40,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:38:40,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:38:40,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:38:40,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:38:40,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:38:40,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:38:40,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:38:40,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:38:40,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:38:40,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:38:40,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:38:40,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:38:40,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:38:40,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:38:40,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:38:40,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:38:40,366 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:38:40,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:38:40,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:38:40,373 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:38:40,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-22 04:38:40,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe4d9df8/2971924247164226b84e8df74e2ca859/FLAG847a1ffa3 [2020-08-22 04:38:40,833 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:38:40,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-08-22 04:38:40,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe4d9df8/2971924247164226b84e8df74e2ca859/FLAG847a1ffa3 [2020-08-22 04:38:41,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe4d9df8/2971924247164226b84e8df74e2ca859 [2020-08-22 04:38:41,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:38:41,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:38:41,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:38:41,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:38:41,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:38:41,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ef601eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41, skipping insertion in model container [2020-08-22 04:38:41,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:38:41,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:38:41,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:38:41,461 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:38:41,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:38:41,488 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:38:41,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41 WrapperNode [2020-08-22 04:38:41,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:38:41,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:38:41,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:38:41,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:38:41,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... [2020-08-22 04:38:41,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:38:41,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:38:41,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:38:41,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:38:41,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:38:41,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:38:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:38:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 04:38:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 04:38:41,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:38:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:38:41,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:38:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 04:38:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 04:38:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:38:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:38:41,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:38:41,901 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:38:41,902 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 04:38:41,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:41 BoogieIcfgContainer [2020-08-22 04:38:41,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:38:41,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:38:41,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:38:41,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:38:41,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:38:41" (1/3) ... [2020-08-22 04:38:41,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8886c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:41, skipping insertion in model container [2020-08-22 04:38:41,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:38:41" (2/3) ... [2020-08-22 04:38:41,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8886c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:38:41, skipping insertion in model container [2020-08-22 04:38:41,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:38:41" (3/3) ... [2020-08-22 04:38:41,939 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-08-22 04:38:41,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:38:41,964 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:38:41,998 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:38:42,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:38:42,026 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:38:42,026 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:38:42,026 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:38:42,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:38:42,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:38:42,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:38:42,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:38:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 04:38:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 04:38:42,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:42,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:42,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-22 04:38:42,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:42,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892635164] [2020-08-22 04:38:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:38:42,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892635164] [2020-08-22 04:38:42,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:38:42,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:38:42,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109239737] [2020-08-22 04:38:42,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:38:42,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:38:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:38:42,298 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 04:38:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:42,423 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 04:38:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:38:42,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 04:38:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:42,436 INFO L225 Difference]: With dead ends: 44 [2020-08-22 04:38:42,437 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 04:38:42,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:38:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 04:38:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 04:38:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:38:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 04:38:42,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-22 04:38:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:42,487 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 04:38:42,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:38:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 04:38:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 04:38:42,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:42,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:42,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:38:42,491 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:42,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-22 04:38:42,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:42,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835750872] [2020-08-22 04:38:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:38:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835750872] [2020-08-22 04:38:42,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:38:42,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:38:42,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255462432] [2020-08-22 04:38:42,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:38:42,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:38:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:38:42,568 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-22 04:38:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:42,631 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 04:38:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:38:42,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 04:38:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:42,634 INFO L225 Difference]: With dead ends: 36 [2020-08-22 04:38:42,634 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:38:42,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:38:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:38:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 04:38:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:38:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 04:38:42,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-22 04:38:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:42,646 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 04:38:42,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:38:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 04:38:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:38:42,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:42,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:42,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:38:42,649 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-22 04:38:42,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:42,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057959369] [2020-08-22 04:38:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 04:38:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 04:38:42,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057959369] [2020-08-22 04:38:42,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:42,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:38:42,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358597650] [2020-08-22 04:38:42,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:38:42,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:38:42,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:38:42,789 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-22 04:38:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:42,892 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-22 04:38:42,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:38:42,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-22 04:38:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:42,895 INFO L225 Difference]: With dead ends: 58 [2020-08-22 04:38:42,895 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 04:38:42,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:38:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 04:38:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 04:38:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 04:38:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-22 04:38:42,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-22 04:38:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:42,908 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-22 04:38:42,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:38:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-22 04:38:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:38:42,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:42,910 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] [2020-08-22 04:38:42,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:38:42,911 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:42,911 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-22 04:38:42,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:42,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253445584] [2020-08-22 04:38:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:42,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 04:38:43,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253445584] [2020-08-22 04:38:43,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:43,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:38:43,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21719449] [2020-08-22 04:38:43,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:38:43,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:38:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:38:43,058 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-22 04:38:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:43,245 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-22 04:38:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:38:43,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-22 04:38:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:43,249 INFO L225 Difference]: With dead ends: 54 [2020-08-22 04:38:43,249 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 04:38:43,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:38:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 04:38:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 04:38:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 04:38:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-22 04:38:43,264 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-22 04:38:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:43,264 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-22 04:38:43,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:38:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-22 04:38:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 04:38:43,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:43,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2020-08-22 04:38:43,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:38:43,267 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:43,268 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-22 04:38:43,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:43,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489111735] [2020-08-22 04:38:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 04:38:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 04:38:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 04:38:43,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489111735] [2020-08-22 04:38:43,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:43,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:38:43,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652006896] [2020-08-22 04:38:43,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:38:43,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:38:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:38:43,408 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-22 04:38:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:43,500 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-22 04:38:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:38:43,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-22 04:38:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:43,505 INFO L225 Difference]: With dead ends: 94 [2020-08-22 04:38:43,505 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 04:38:43,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:38:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 04:38:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 04:38:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 04:38:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-22 04:38:43,519 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-22 04:38:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:43,520 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-22 04:38:43,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:38:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-22 04:38:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 04:38:43,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:43,522 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2020-08-22 04:38:43,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:38:43,523 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-22 04:38:43,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:43,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583663685] [2020-08-22 04:38:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 04:38:43,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583663685] [2020-08-22 04:38:43,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:43,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:38:43,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839190815] [2020-08-22 04:38:43,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:38:43,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:38:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:38:43,653 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-22 04:38:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:43,758 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-22 04:38:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:38:43,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 04:38:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:43,760 INFO L225 Difference]: With dead ends: 103 [2020-08-22 04:38:43,761 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 04:38:43,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:38:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 04:38:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 04:38:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 04:38:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-22 04:38:43,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-22 04:38:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:43,774 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-22 04:38:43,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:38:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-22 04:38:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 04:38:43,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:43,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2020-08-22 04:38:43,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:38:43,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-22 04:38:43,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:43,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934345503] [2020-08-22 04:38:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 04:38:43,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934345503] [2020-08-22 04:38:43,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:43,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:38:43,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721443126] [2020-08-22 04:38:43,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:38:43,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:38:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:38:43,952 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-22 04:38:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:44,137 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-22 04:38:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:38:44,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-22 04:38:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:44,141 INFO L225 Difference]: With dead ends: 86 [2020-08-22 04:38:44,141 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 04:38:44,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:38:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 04:38:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 04:38:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 04:38:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-22 04:38:44,160 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-22 04:38:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:44,161 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-22 04:38:44,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:38:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-22 04:38:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 04:38:44,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:44,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-08-22 04:38:44,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:38:44,165 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:44,165 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-22 04:38:44,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:44,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298956865] [2020-08-22 04:38:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 04:38:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 04:38:44,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298956865] [2020-08-22 04:38:44,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:44,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:38:44,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967126519] [2020-08-22 04:38:44,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:38:44,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:38:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:38:44,316 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-22 04:38:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:44,433 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-22 04:38:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:38:44,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-22 04:38:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:44,436 INFO L225 Difference]: With dead ends: 167 [2020-08-22 04:38:44,436 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 04:38:44,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:38:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 04:38:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-22 04:38:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 04:38:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-22 04:38:44,456 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-22 04:38:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:44,456 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-22 04:38:44,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:38:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-22 04:38:44,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 04:38:44,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:44,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:44,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:38:44,460 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-22 04:38:44,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:44,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093315942] [2020-08-22 04:38:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 04:38:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093315942] [2020-08-22 04:38:44,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:44,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:38:44,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794168838] [2020-08-22 04:38:44,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:38:44,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:38:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:38:44,629 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-22 04:38:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:44,850 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-22 04:38:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:38:44,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-22 04:38:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:44,853 INFO L225 Difference]: With dead ends: 188 [2020-08-22 04:38:44,853 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 04:38:44,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:38:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 04:38:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-22 04:38:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 04:38:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-22 04:38:44,872 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-22 04:38:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:44,873 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-22 04:38:44,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:38:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-22 04:38:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 04:38:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:44,875 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:44,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:38:44,876 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-22 04:38:44,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:44,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610249943] [2020-08-22 04:38:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:44,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-22 04:38:45,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610249943] [2020-08-22 04:38:45,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:45,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:38:45,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726272493] [2020-08-22 04:38:45,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:38:45,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:38:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:38:45,112 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-22 04:38:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:45,513 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-22 04:38:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 04:38:45,514 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-22 04:38:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:45,516 INFO L225 Difference]: With dead ends: 199 [2020-08-22 04:38:45,516 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 04:38:45,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:38:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 04:38:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-22 04:38:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 04:38:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-22 04:38:45,537 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-22 04:38:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:45,537 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-22 04:38:45,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:38:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-22 04:38:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 04:38:45,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:45,540 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:45,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:38:45,541 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-22 04:38:45,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:45,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938908990] [2020-08-22 04:38:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 04:38:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-22 04:38:45,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938908990] [2020-08-22 04:38:45,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:45,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:38:45,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954877293] [2020-08-22 04:38:45,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:38:45,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:38:45,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:38:45,819 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-22 04:38:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:46,017 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-22 04:38:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:38:46,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-22 04:38:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:46,020 INFO L225 Difference]: With dead ends: 142 [2020-08-22 04:38:46,020 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 04:38:46,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:38:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 04:38:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 04:38:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 04:38:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-22 04:38:46,031 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-22 04:38:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:46,032 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-22 04:38:46,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:38:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-22 04:38:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-22 04:38:46,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:46,034 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:46,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:38:46,035 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:46,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-22 04:38:46,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:46,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334669180] [2020-08-22 04:38:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 04:38:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 04:38:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 04:38:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2020-08-22 04:38:46,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334669180] [2020-08-22 04:38:46,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:46,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:38:46,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144370897] [2020-08-22 04:38:46,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:38:46,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:38:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:38:46,539 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states. [2020-08-22 04:38:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:47,126 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions. [2020-08-22 04:38:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 04:38:47,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192 [2020-08-22 04:38:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:47,129 INFO L225 Difference]: With dead ends: 184 [2020-08-22 04:38:47,129 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 04:38:47,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:38:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 04:38:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-08-22 04:38:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 04:38:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-08-22 04:38:47,140 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192 [2020-08-22 04:38:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:47,141 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-08-22 04:38:47,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:38:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-08-22 04:38:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 04:38:47,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:47,143 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:47,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:38:47,143 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times [2020-08-22 04:38:47,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:47,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766021553] [2020-08-22 04:38:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 04:38:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 04:38:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-08-22 04:38:47,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766021553] [2020-08-22 04:38:47,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:47,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:38:47,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672098176] [2020-08-22 04:38:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:38:47,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:38:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:38:47,395 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2020-08-22 04:38:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:47,655 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions. [2020-08-22 04:38:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:38:47,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-22 04:38:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:47,658 INFO L225 Difference]: With dead ends: 188 [2020-08-22 04:38:47,658 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 04:38:47,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:38:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 04:38:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-08-22 04:38:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 04:38:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions. [2020-08-22 04:38:47,671 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136 [2020-08-22 04:38:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:47,671 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions. [2020-08-22 04:38:47,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:38:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions. [2020-08-22 04:38:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-22 04:38:47,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:47,675 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:47,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:38:47,676 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-08-22 04:38:47,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:47,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453466099] [2020-08-22 04:38:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:47,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 04:38:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 04:38:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-08-22 04:38:48,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453466099] [2020-08-22 04:38:48,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:48,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:38:48,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020885720] [2020-08-22 04:38:48,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:38:48,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:38:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:38:48,174 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states. [2020-08-22 04:38:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:48,733 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions. [2020-08-22 04:38:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 04:38:48,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177 [2020-08-22 04:38:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:48,736 INFO L225 Difference]: With dead ends: 217 [2020-08-22 04:38:48,736 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 04:38:48,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:38:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 04:38:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2020-08-22 04:38:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 04:38:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-08-22 04:38:48,747 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177 [2020-08-22 04:38:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:48,748 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-08-22 04:38:48,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:38:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-08-22 04:38:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 04:38:48,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:48,751 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:48,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:38:48,751 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2020-08-22 04:38:48,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:48,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690936373] [2020-08-22 04:38:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:38:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 04:38:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 04:38:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:48,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 04:38:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 04:38:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 04:38:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 04:38:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 04:38:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:38:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-08-22 04:38:49,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690936373] [2020-08-22 04:38:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:38:49,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:38:49,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174697536] [2020-08-22 04:38:49,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:38:49,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:38:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:38:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:38:49,120 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states. [2020-08-22 04:38:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:38:49,632 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2020-08-22 04:38:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 04:38:49,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150 [2020-08-22 04:38:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:38:49,635 INFO L225 Difference]: With dead ends: 211 [2020-08-22 04:38:49,635 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 04:38:49,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:38:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 04:38:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-08-22 04:38:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 04:38:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2020-08-22 04:38:49,653 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150 [2020-08-22 04:38:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:38:49,653 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2020-08-22 04:38:49,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:38:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2020-08-22 04:38:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-22 04:38:49,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:38:49,657 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:38:49,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:38:49,657 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:38:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:38:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2020-08-22 04:38:49,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:38:49,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575781149] [2020-08-22 04:38:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:38:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 04:38:49,690 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 04:38:49,693 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 04:38:49,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:38:49,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:38:49 BoogieIcfgContainer [2020-08-22 04:38:49,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:38:49,751 INFO L168 Benchmark]: Toolchain (without parser) took 8510.50 ms. Allocated memory was 138.9 MB in the beginning and 368.6 MB in the end (delta: 229.6 MB). Free memory was 102.1 MB in the beginning and 298.7 MB in the end (delta: -196.6 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,751 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,764 INFO L168 Benchmark]: Boogie Preprocessor took 109.13 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 179.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,764 INFO L168 Benchmark]: RCFGBuilder took 309.15 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 166.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,765 INFO L168 Benchmark]: TraceAbstraction took 7836.95 ms. Allocated memory was 200.8 MB in the beginning and 368.6 MB in the end (delta: 167.8 MB). Free memory was 165.4 MB in the beginning and 298.7 MB in the end (delta: -133.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:38:49,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.62 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.13 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 179.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.15 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 166.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7836.95 ms. Allocated memory was 200.8 MB in the beginning and 368.6 MB in the end (delta: 167.8 MB). Free memory was 165.4 MB in the beginning and 298.7 MB in the end (delta: -133.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 8 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.6s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2621 SolverSat, 334 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 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...