/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:58:13,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:58:13,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:58:13,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:58:13,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:58:13,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:58:13,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:58:13,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:58:13,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:58:13,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:58:13,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:58:13,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:58:13,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:58:13,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:58:13,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:58:13,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:58:13,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:58:13,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:58:13,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:58:13,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:58:13,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:58:13,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:58:13,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:58:13,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:58:13,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:58:13,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:58:13,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:58:13,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:58:13,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:58:13,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:58:13,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:58:13,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:58:13,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:58:13,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:58:13,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:58:13,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:58:13,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:58:13,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:58:13,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:58:13,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:58:13,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:58:13,503 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 [2020-08-21 22:58:13,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:58:13,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:58:13,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:58:13,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:58:13,549 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:58:13,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:58:13,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:58:13,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:58:13,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:58:13,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:58:13,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:58:13,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:58:13,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:58:13,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:58:13,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:58:13,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:58:13,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:58:13,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:58:13,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:58:13,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:58:13,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:58:13,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:58:13,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:58:13,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:58:13,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:58:13,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:58:13,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:58:13,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:58:13,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:58:13,555 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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:58:13,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:58:13,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:58:13,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:58:13,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:58:13,851 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:58:13,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-21 22:58:13,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c577cd6/04a5c9b8980747279c688de1b9fe1135/FLAG6fab77705 [2020-08-21 22:58:14,403 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:58:14,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-21 22:58:14,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c577cd6/04a5c9b8980747279c688de1b9fe1135/FLAG6fab77705 [2020-08-21 22:58:14,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c577cd6/04a5c9b8980747279c688de1b9fe1135 [2020-08-21 22:58:14,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:58:14,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:58:14,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:14,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:58:14,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:58:14,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:14" (1/1) ... [2020-08-21 22:58:14,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e5903c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:14, skipping insertion in model container [2020-08-21 22:58:14,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:14" (1/1) ... [2020-08-21 22:58:14,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:58:14,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:58:15,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:15,010 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:58:15,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:15,045 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:58:15,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15 WrapperNode [2020-08-21 22:58:15,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:15,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:58:15,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:58:15,047 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:58:15,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (1/1) ... [2020-08-21 22:58:15,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:58:15,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:58:15,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:58:15,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:58:15,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (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 [2020-08-21 22:58:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:58:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:58:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 22:58:15,230 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 22:58:15,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:58:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:58:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:58:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 22:58:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 22:58:15,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:58:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:58:15,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:58:15,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:58:15,449 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:58:15,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:15 BoogieIcfgContainer [2020-08-21 22:58:15,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:58:15,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:58:15,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:58:15,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:58:15,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:58:14" (1/3) ... [2020-08-21 22:58:15,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:15, skipping insertion in model container [2020-08-21 22:58:15,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:15" (2/3) ... [2020-08-21 22:58:15,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:15, skipping insertion in model container [2020-08-21 22:58:15,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:15" (3/3) ... [2020-08-21 22:58:15,462 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-08-21 22:58:15,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:58:15,478 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:58:15,492 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:58:15,518 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:58:15,519 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:58:15,519 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:58:15,519 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:58:15,519 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:58:15,519 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:58:15,519 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:58:15,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:58:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 22:58:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:58:15,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:15,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:15,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 22:58:15,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:15,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879504453] [2020-08-21 22:58:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:58:15,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879504453] [2020-08-21 22:58:15,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:58:15,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611458877] [2020-08-21 22:58:15,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:58:15,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:58:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:58:15,819 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 22:58:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:15,961 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 22:58:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:58:15,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:58:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:15,978 INFO L225 Difference]: With dead ends: 44 [2020-08-21 22:58:15,979 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:58:15,983 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 [2020-08-21 22:58:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:58:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:58:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:58:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 22:58:16,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 22:58:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,041 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 22:58:16,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:58:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 22:58:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 22:58:16,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:16,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:58:16,044 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 22:58:16,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533829009] [2020-08-21 22:58:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:58:16,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533829009] [2020-08-21 22:58:16,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:16,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:58:16,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445978290] [2020-08-21 22:58:16,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:58:16,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:58:16,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:58:16,132 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 22:58:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:16,216 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 22:58:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:58:16,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 22:58:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:16,219 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:58:16,219 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 22:58:16,221 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 [2020-08-21 22:58:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 22:58:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 22:58:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:58:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 22:58:16,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 22:58:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,232 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 22:58:16,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:58:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 22:58:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:58:16,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,234 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] [2020-08-21 22:58:16,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:58:16,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 22:58:16,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824210414] [2020-08-21 22:58:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:58:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:58:16,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824210414] [2020-08-21 22:58:16,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:16,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:58:16,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364305944] [2020-08-21 22:58:16,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:58:16,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:58:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:16,374 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 22:58:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:16,469 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 22:58:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:58:16,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 22:58:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:16,471 INFO L225 Difference]: With dead ends: 58 [2020-08-21 22:58:16,472 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 22:58:16,473 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 [2020-08-21 22:58:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 22:58:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 22:58:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 22:58:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 22:58:16,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 22:58:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,488 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 22:58:16,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:58:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 22:58:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 22:58:16,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,495 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] [2020-08-21 22:58:16,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:58:16,496 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 22:58:16,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499798082] [2020-08-21 22:58:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:58:16,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499798082] [2020-08-21 22:58:16,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:16,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:58:16,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220098757] [2020-08-21 22:58:16,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:58:16,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:58:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:16,667 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 22:58:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:16,857 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 22:58:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:58:16,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 22:58:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:16,862 INFO L225 Difference]: With dead ends: 54 [2020-08-21 22:58:16,862 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 22:58:16,863 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 [2020-08-21 22:58:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 22:58:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 22:58:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 22:58:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 22:58:16,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 22:58:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:16,878 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 22:58:16,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:58:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 22:58:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 22:58:16,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:16,881 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] [2020-08-21 22:58:16,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:58:16,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 22:58:16,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:16,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938827984] [2020-08-21 22:58:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 22:58:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 22:58:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:58:16,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938827984] [2020-08-21 22:58:16,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:16,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:58:16,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872105391] [2020-08-21 22:58:16,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:58:17,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:58:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:58:17,000 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 22:58:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:17,078 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 22:58:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:58:17,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 22:58:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:17,081 INFO L225 Difference]: With dead ends: 94 [2020-08-21 22:58:17,081 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 22:58:17,083 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 [2020-08-21 22:58:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 22:58:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 22:58:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 22:58:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 22:58:17,096 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 22:58:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:17,096 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 22:58:17,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:58:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 22:58:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 22:58:17,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:17,099 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] [2020-08-21 22:58:17,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:58:17,100 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 22:58:17,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:17,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727823547] [2020-08-21 22:58:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 22:58:17,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727823547] [2020-08-21 22:58:17,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:17,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:17,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841647208] [2020-08-21 22:58:17,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:17,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:17,241 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 22:58:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:17,359 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 22:58:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:58:17,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 22:58:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:17,362 INFO L225 Difference]: With dead ends: 103 [2020-08-21 22:58:17,362 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 22:58:17,363 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 [2020-08-21 22:58:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 22:58:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 22:58:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:58:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 22:58:17,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 22:58:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:17,376 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 22:58:17,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 22:58:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 22:58:17,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:17,379 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] [2020-08-21 22:58:17,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:58:17,380 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 22:58:17,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:17,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586310467] [2020-08-21 22:58:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 22:58:17,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586310467] [2020-08-21 22:58:17,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:17,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:17,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067696113] [2020-08-21 22:58:17,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:17,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:17,566 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 22:58:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:17,802 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 22:58:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:58:17,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 22:58:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:17,805 INFO L225 Difference]: With dead ends: 86 [2020-08-21 22:58:17,806 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 22:58:17,806 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 [2020-08-21 22:58:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 22:58:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 22:58:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 22:58:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 22:58:17,822 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 22:58:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:17,823 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 22:58:17,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 22:58:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 22:58:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:17,827 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] [2020-08-21 22:58:17,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:58:17,827 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 22:58:17,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:17,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660701906] [2020-08-21 22:58:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:17,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 22:58:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 22:58:18,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660701906] [2020-08-21 22:58:18,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:18,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:18,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073623478] [2020-08-21 22:58:18,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:18,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:18,044 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 22:58:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:18,199 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 22:58:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:58:18,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 22:58:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:18,204 INFO L225 Difference]: With dead ends: 167 [2020-08-21 22:58:18,204 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 22:58:18,209 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 [2020-08-21 22:58:18,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 22:58:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 22:58:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 22:58:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 22:58:18,246 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 22:58:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:18,247 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 22:58:18,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 22:58:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:58:18,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:18,252 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] [2020-08-21 22:58:18,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:58:18,256 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 22:58:18,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:18,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443350210] [2020-08-21 22:58:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 22:58:18,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443350210] [2020-08-21 22:58:18,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:18,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:58:18,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566239717] [2020-08-21 22:58:18,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:58:18,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:58:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:18,464 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 22:58:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:18,713 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 22:58:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:58:18,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 22:58:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:18,718 INFO L225 Difference]: With dead ends: 188 [2020-08-21 22:58:18,718 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 22:58:18,719 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 [2020-08-21 22:58:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 22:58:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 22:58:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 22:58:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 22:58:18,753 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 22:58:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:18,753 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 22:58:18,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:58:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 22:58:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 22:58:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:18,757 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] [2020-08-21 22:58:18,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:58:18,758 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 22:58:18,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:18,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139877498] [2020-08-21 22:58:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:18,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 22:58:19,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139877498] [2020-08-21 22:58:19,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:19,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:19,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502352153] [2020-08-21 22:58:19,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:19,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:19,029 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 22:58:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:19,455 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 22:58:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:58:19,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 22:58:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:19,460 INFO L225 Difference]: With dead ends: 199 [2020-08-21 22:58:19,460 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 22:58:19,462 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 [2020-08-21 22:58:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 22:58:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-21 22:58:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 22:58:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-21 22:58:19,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-21 22:58:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:19,473 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-21 22:58:19,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-21 22:58:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 22:58:19,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:19,474 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] [2020-08-21 22:58:19,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:58:19,475 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-21 22:58:19,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:19,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142345434] [2020-08-21 22:58:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 22:58:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 22:58:19,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142345434] [2020-08-21 22:58:19,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:19,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:58:19,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186924554] [2020-08-21 22:58:19,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:58:19,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:58:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:19,751 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-21 22:58:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:19,946 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-21 22:58:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:58:19,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 22:58:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:19,948 INFO L225 Difference]: With dead ends: 142 [2020-08-21 22:58:19,948 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 22:58:19,949 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 [2020-08-21 22:58:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 22:58:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-21 22:58:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:58:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-21 22:58:19,956 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-21 22:58:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:19,957 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-21 22:58:19,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:58:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-21 22:58:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 22:58:19,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:19,959 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] [2020-08-21 22:58:19,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:58:19,959 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-21 22:58:19,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:19,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526766591] [2020-08-21 22:58:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 22:58:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:58:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 22:58:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-21 22:58:20,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526766591] [2020-08-21 22:58:20,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:20,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:20,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102597210] [2020-08-21 22:58:20,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:20,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:20,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:20,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:20,361 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-21 22:58:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:20,744 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-21 22:58:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:58:20,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-21 22:58:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:20,747 INFO L225 Difference]: With dead ends: 178 [2020-08-21 22:58:20,747 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 22:58:20,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:58:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 22:58:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-21 22:58:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 22:58:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-21 22:58:20,762 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-21 22:58:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:20,763 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-21 22:58:20,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-21 22:58:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-21 22:58:20,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:20,765 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:20,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:58:20,765 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:20,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-21 22:58:20,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:20,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430286572] [2020-08-21 22:58:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:20,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 22:58:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-21 22:58:21,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430286572] [2020-08-21 22:58:21,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:21,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:58:21,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198186335] [2020-08-21 22:58:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:58:21,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:58:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:58:21,042 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-21 22:58:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:21,295 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-21 22:58:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:58:21,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-21 22:58:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:21,299 INFO L225 Difference]: With dead ends: 172 [2020-08-21 22:58:21,299 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 22:58:21,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:58:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 22:58:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-21 22:58:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-21 22:58:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-21 22:58:21,317 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-21 22:58:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:21,319 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-21 22:58:21,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:58:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-21 22:58:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 22:58:21,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:21,323 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:21,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:58:21,323 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:21,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-21 22:58:21,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:21,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563809140] [2020-08-21 22:58:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 22:58:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 22:58:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:58:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 22:58:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 22:58:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-21 22:58:21,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563809140] [2020-08-21 22:58:21,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:21,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:21,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744644182] [2020-08-21 22:58:21,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:21,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:21,621 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-21 22:58:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:21,978 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-21 22:58:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:58:21,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-21 22:58:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:21,982 INFO L225 Difference]: With dead ends: 185 [2020-08-21 22:58:21,982 INFO L226 Difference]: Without dead ends: 104 [2020-08-21 22:58:21,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:58:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-21 22:58:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-21 22:58:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 22:58:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-21 22:58:21,993 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-21 22:58:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:21,993 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-21 22:58:21,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-21 22:58:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 22:58:21,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:21,997 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:21,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:58:21,997 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-21 22:58:21,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:21,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194777839] [2020-08-21 22:58:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:58:22,028 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:58:22,028 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:58:22,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:58:22,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:58:22 BoogieIcfgContainer [2020-08-21 22:58:22,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:58:22,074 INFO L168 Benchmark]: Toolchain (without parser) took 7284.74 ms. Allocated memory was 140.5 MB in the beginning and 304.6 MB in the end (delta: 164.1 MB). Free memory was 103.8 MB in the beginning and 170.9 MB in the end (delta: -67.1 MB). Peak memory consumption was 97.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,075 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,079 INFO L168 Benchmark]: Boogie Preprocessor took 112.28 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,083 INFO L168 Benchmark]: RCFGBuilder took 294.29 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 168.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,084 INFO L168 Benchmark]: TraceAbstraction took 6616.17 ms. Allocated memory was 203.9 MB in the beginning and 304.6 MB in the end (delta: 100.7 MB). Free memory was 168.8 MB in the beginning and 170.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 98.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:22,092 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.28 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.0 MB in the beginning and 182.6 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.29 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 168.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6616.17 ms. Allocated memory was 203.9 MB in the beginning and 304.6 MB in the end (delta: 100.7 MB). Free memory was 168.8 MB in the beginning and 170.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 98.6 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 = 5; [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 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-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 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-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.5s, OverallIterations: 15, TraceHistogramMax: 17, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 411 SDslu, 1760 SDs, 0 SdLazy, 1945 SolverSat, 252 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, 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, 14 MinimizatonAttempts, 74 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 885 ConstructedInterpolants, 0 QuantifiedInterpolants, 140149 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1400/2017 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...