/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:16:20,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:16:20,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:16:20,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:16:20,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:16:20,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:16:20,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:16:20,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:16:20,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:16:20,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:16:20,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:16:20,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:16:20,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:16:20,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:16:20,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:16:20,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:16:20,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:16:20,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:16:20,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:16:20,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:16:20,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:16:20,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:16:20,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:16:20,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:16:20,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 06:16:20,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:16:20,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:16:20,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:16:20,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:16:20,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:16:20,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:16:20,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:16:20,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:16:20,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:16:20,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:16:20,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:16:20,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 06:16:20,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:16:20,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:16:20,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:16:20,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:16:20,526 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:16:20,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:16:20,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:16:20,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:16:20,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:16:20,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:16:20,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:16:20,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:16:20,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:16:20,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:16:20,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:16:20,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:16:20,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:16:20,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:16:20,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:16:20,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:16:20,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:16:20,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:16:20,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:16:20,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:16:20,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:16:20,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:16:20,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:16:20,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:16:20,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:16:20,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:16:20,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:16:20,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:16:20,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:16:20,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:16:20,851 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:16:20,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-22 06:16:20,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58c7b87bf/8ea967be29c4428794743723429bf166/FLAG006ecf14f [2020-08-22 06:16:21,314 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:16:21,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-08-22 06:16:21,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58c7b87bf/8ea967be29c4428794743723429bf166/FLAG006ecf14f [2020-08-22 06:16:21,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58c7b87bf/8ea967be29c4428794743723429bf166 [2020-08-22 06:16:21,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:16:21,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:16:21,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:16:21,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:16:21,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:16:21,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:16:21" (1/1) ... [2020-08-22 06:16:21,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53352fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:21, skipping insertion in model container [2020-08-22 06:16:21,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:16:21" (1/1) ... [2020-08-22 06:16:21,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:16:21,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:16:21,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:16:22,001 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:16:22,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:16:22,024 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:16:22,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22 WrapperNode [2020-08-22 06:16:22,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:16:22,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:16:22,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:16:22,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:16:22,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... [2020-08-22 06:16:22,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:16:22,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:16:22,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:16:22,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:16:22,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:16:22,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:16:22,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:16:22,194 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 06:16:22,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:16:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:16:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:16:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 06:16:22,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:16:22,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:16:22,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:16:22,346 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:16:22,347 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 06:16:22,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:16:22 BoogieIcfgContainer [2020-08-22 06:16:22,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:16:22,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:16:22,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:16:22,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:16:22,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:16:21" (1/3) ... [2020-08-22 06:16:22,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e53062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:16:22, skipping insertion in model container [2020-08-22 06:16:22,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:16:22" (2/3) ... [2020-08-22 06:16:22,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e53062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:16:22, skipping insertion in model container [2020-08-22 06:16:22,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:16:22" (3/3) ... [2020-08-22 06:16:22,358 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-08-22 06:16:22,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:16:22,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:16:22,387 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:16:22,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:16:22,410 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:16:22,410 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:16:22,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:16:22,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:16:22,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:16:22,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:16:22,411 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:16:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 06:16:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 06:16:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:22,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:22,433 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 06:16:22,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:22,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779560449] [2020-08-22 06:16:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:16:22,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779560449] [2020-08-22 06:16:22,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:16:22,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 06:16:22,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861744196] [2020-08-22 06:16:22,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 06:16:22,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 06:16:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 06:16:22,698 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 06:16:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:22,784 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 06:16:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 06:16:22,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 06:16:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:22,798 INFO L225 Difference]: With dead ends: 30 [2020-08-22 06:16:22,798 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 06:16:22,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:16:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 06:16:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 06:16:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 06:16:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 06:16:22,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 06:16:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:22,842 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 06:16:22,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 06:16:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 06:16:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:16:22,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:22,844 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:22,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:16:22,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 06:16:22,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:22,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482550808] [2020-08-22 06:16:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 06:16:22,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482550808] [2020-08-22 06:16:22,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:22,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 06:16:22,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173918924] [2020-08-22 06:16:22,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 06:16:22,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:22,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 06:16:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 06:16:22,989 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 06:16:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:23,054 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 06:16:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 06:16:23,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 06:16:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:23,056 INFO L225 Difference]: With dead ends: 25 [2020-08-22 06:16:23,056 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 06:16:23,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:16:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 06:16:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 06:16:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 06:16:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 06:16:23,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 06:16:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:23,066 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 06:16:23,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 06:16:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 06:16:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 06:16:23,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:23,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:23,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:16:23,069 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 06:16:23,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:23,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131017995] [2020-08-22 06:16:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 06:16:23,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131017995] [2020-08-22 06:16:23,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:23,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 06:16:23,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577423728] [2020-08-22 06:16:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 06:16:23,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 06:16:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 06:16:23,266 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 06:16:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:23,335 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 06:16:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 06:16:23,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 06:16:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:23,337 INFO L225 Difference]: With dead ends: 28 [2020-08-22 06:16:23,337 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 06:16:23,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:16:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 06:16:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 06:16:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 06:16:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 06:16:23,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 06:16:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:23,346 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 06:16:23,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 06:16:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 06:16:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 06:16:23,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:23,348 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:23,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:16:23,349 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 06:16:23,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:23,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043350584] [2020-08-22 06:16:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 06:16:23,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043350584] [2020-08-22 06:16:23,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:23,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 06:16:23,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833253377] [2020-08-22 06:16:23,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 06:16:23,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 06:16:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 06:16:23,570 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 06:16:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:23,719 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 06:16:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 06:16:23,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 06:16:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:23,722 INFO L225 Difference]: With dead ends: 31 [2020-08-22 06:16:23,723 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 06:16:23,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:16:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 06:16:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 06:16:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 06:16:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 06:16:23,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 06:16:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:23,741 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 06:16:23,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 06:16:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 06:16:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 06:16:23,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:23,746 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:23,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:16:23,747 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 06:16:23,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:23,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031199121] [2020-08-22 06:16:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 06:16:23,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031199121] [2020-08-22 06:16:23,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:23,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 06:16:23,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023339914] [2020-08-22 06:16:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 06:16:23,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 06:16:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 06:16:23,999 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 06:16:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:24,086 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 06:16:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 06:16:24,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 06:16:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:24,089 INFO L225 Difference]: With dead ends: 34 [2020-08-22 06:16:24,089 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 06:16:24,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:16:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 06:16:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 06:16:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 06:16:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 06:16:24,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 06:16:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:24,098 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 06:16:24,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 06:16:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 06:16:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 06:16:24,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:24,100 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:24,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:16:24,100 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 06:16:24,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:24,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117456052] [2020-08-22 06:16:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 06:16:24,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117456052] [2020-08-22 06:16:24,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:24,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 06:16:24,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749584105] [2020-08-22 06:16:24,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 06:16:24,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 06:16:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 06:16:24,358 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 06:16:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:24,459 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 06:16:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 06:16:24,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 06:16:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:24,464 INFO L225 Difference]: With dead ends: 37 [2020-08-22 06:16:24,465 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 06:16:24,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:16:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 06:16:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 06:16:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 06:16:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 06:16:24,479 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 06:16:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:24,482 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 06:16:24,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 06:16:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 06:16:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 06:16:24,491 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:24,491 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:24,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:16:24,492 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 06:16:24,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:24,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-08-22 06:16:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 06:16:24,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-08-22 06:16:24,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:24,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 06:16:24,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128887066] [2020-08-22 06:16:24,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 06:16:24,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 06:16:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 06:16:24,768 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 06:16:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:24,888 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 06:16:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 06:16:24,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 06:16:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:24,890 INFO L225 Difference]: With dead ends: 40 [2020-08-22 06:16:24,890 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 06:16:24,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:16:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 06:16:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 06:16:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 06:16:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 06:16:24,898 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 06:16:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:24,898 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 06:16:24,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 06:16:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 06:16:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 06:16:24,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:24,900 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:24,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:16:24,900 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:24,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 06:16:24,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:24,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541047397] [2020-08-22 06:16:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:24,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 06:16:25,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541047397] [2020-08-22 06:16:25,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:25,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 06:16:25,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728711081] [2020-08-22 06:16:25,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 06:16:25,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:25,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 06:16:25,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 06:16:25,193 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 06:16:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:25,326 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 06:16:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 06:16:25,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 06:16:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:25,329 INFO L225 Difference]: With dead ends: 43 [2020-08-22 06:16:25,329 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 06:16:25,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 06:16:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 06:16:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 06:16:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 06:16:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 06:16:25,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 06:16:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:25,342 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 06:16:25,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 06:16:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 06:16:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 06:16:25,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:25,343 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:25,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:16:25,344 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 06:16:25,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:25,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272511929] [2020-08-22 06:16:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 06:16:25,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272511929] [2020-08-22 06:16:25,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:25,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 06:16:25,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650676400] [2020-08-22 06:16:25,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 06:16:25,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 06:16:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 06:16:25,691 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 06:16:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:25,847 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 06:16:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 06:16:25,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 06:16:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:25,851 INFO L225 Difference]: With dead ends: 46 [2020-08-22 06:16:25,852 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 06:16:25,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 06:16:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 06:16:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 06:16:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 06:16:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 06:16:25,865 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 06:16:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:25,865 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 06:16:25,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 06:16:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 06:16:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 06:16:25,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:25,870 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:25,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:16:25,870 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 06:16:25,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:25,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413082395] [2020-08-22 06:16:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:25,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 06:16:26,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413082395] [2020-08-22 06:16:26,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:26,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 06:16:26,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595520408] [2020-08-22 06:16:26,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 06:16:26,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:26,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 06:16:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 06:16:26,190 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 06:16:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:26,352 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 06:16:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 06:16:26,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 06:16:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:26,354 INFO L225 Difference]: With dead ends: 49 [2020-08-22 06:16:26,354 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 06:16:26,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 06:16:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 06:16:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 06:16:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 06:16:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 06:16:26,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 06:16:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:26,363 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 06:16:26,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 06:16:26,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 06:16:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 06:16:26,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:26,364 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:26,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:16:26,365 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:26,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 06:16:26,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:26,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998055666] [2020-08-22 06:16:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 06:16:26,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998055666] [2020-08-22 06:16:26,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:26,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 06:16:26,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803723683] [2020-08-22 06:16:26,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 06:16:26,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 06:16:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 06:16:26,712 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 06:16:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:26,856 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 06:16:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 06:16:26,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 06:16:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:26,858 INFO L225 Difference]: With dead ends: 52 [2020-08-22 06:16:26,858 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 06:16:26,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 06:16:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 06:16:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 06:16:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 06:16:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 06:16:26,866 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 06:16:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:26,867 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 06:16:26,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 06:16:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 06:16:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 06:16:26,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:26,869 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:26,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:16:26,869 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 06:16:26,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:26,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045968905] [2020-08-22 06:16:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:26,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 06:16:27,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045968905] [2020-08-22 06:16:27,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:27,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 06:16:27,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111270051] [2020-08-22 06:16:27,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 06:16:27,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:27,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 06:16:27,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 06:16:27,286 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 06:16:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:27,455 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 06:16:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 06:16:27,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 06:16:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:27,457 INFO L225 Difference]: With dead ends: 55 [2020-08-22 06:16:27,457 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 06:16:27,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 06:16:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 06:16:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 06:16:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 06:16:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 06:16:27,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 06:16:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:27,465 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 06:16:27,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 06:16:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 06:16:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 06:16:27,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:27,467 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:27,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:16:27,468 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 06:16:27,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:27,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879811042] [2020-08-22 06:16:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 06:16:27,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879811042] [2020-08-22 06:16:27,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:27,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 06:16:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977290492] [2020-08-22 06:16:27,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 06:16:27,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 06:16:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 06:16:27,925 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 06:16:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:28,131 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 06:16:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 06:16:28,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 06:16:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:28,138 INFO L225 Difference]: With dead ends: 58 [2020-08-22 06:16:28,138 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 06:16:28,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 06:16:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 06:16:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 06:16:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 06:16:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 06:16:28,146 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 06:16:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:28,147 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 06:16:28,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 06:16:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 06:16:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 06:16:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:28,148 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:28,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:16:28,149 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 06:16:28,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:28,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742618657] [2020-08-22 06:16:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 06:16:28,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742618657] [2020-08-22 06:16:28,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:28,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 06:16:28,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958022573] [2020-08-22 06:16:28,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 06:16:28,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 06:16:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 06:16:28,717 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 06:16:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:28,908 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 06:16:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 06:16:28,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 06:16:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:28,910 INFO L225 Difference]: With dead ends: 61 [2020-08-22 06:16:28,910 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 06:16:28,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 06:16:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 06:16:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 06:16:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 06:16:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 06:16:28,926 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 06:16:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:28,927 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 06:16:28,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 06:16:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 06:16:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 06:16:28,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:28,931 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:28,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:16:28,931 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:28,932 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 06:16:28,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:28,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058134405] [2020-08-22 06:16:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:28,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 06:16:29,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058134405] [2020-08-22 06:16:29,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:29,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 06:16:29,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793476692] [2020-08-22 06:16:29,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 06:16:29,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 06:16:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 06:16:29,476 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 06:16:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:29,692 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 06:16:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 06:16:29,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 06:16:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:29,694 INFO L225 Difference]: With dead ends: 64 [2020-08-22 06:16:29,694 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 06:16:29,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 06:16:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 06:16:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 06:16:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 06:16:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 06:16:29,701 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 06:16:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:29,702 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 06:16:29,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 06:16:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 06:16:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 06:16:29,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:29,703 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:29,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:16:29,704 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 06:16:29,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:29,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030482467] [2020-08-22 06:16:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:29,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:30,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 06:16:31,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030482467] [2020-08-22 06:16:31,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:31,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 06:16:31,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670359140] [2020-08-22 06:16:31,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 06:16:31,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 06:16:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 06:16:31,167 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-22 06:16:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:31,654 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 06:16:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 06:16:31,655 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-22 06:16:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:31,656 INFO L225 Difference]: With dead ends: 67 [2020-08-22 06:16:31,656 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 06:16:31,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 06:16:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 06:16:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 06:16:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 06:16:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 06:16:31,662 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 06:16:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:31,663 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 06:16:31,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 06:16:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 06:16:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 06:16:31,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:16:31,665 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:16:31,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 06:16:31,665 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:16:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:16:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 06:16:31,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:16:31,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868965642] [2020-08-22 06:16:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:16:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:16:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 06:16:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:31,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 06:16:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:16:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 06:16:32,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868965642] [2020-08-22 06:16:32,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 06:16:32,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 06:16:32,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918679886] [2020-08-22 06:16:32,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 06:16:32,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:16:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 06:16:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-22 06:16:32,410 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-08-22 06:16:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:16:33,340 INFO L93 Difference]: Finished difference Result 152 states and 408 transitions. [2020-08-22 06:16:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 06:16:33,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-08-22 06:16:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:16:33,341 INFO L225 Difference]: With dead ends: 152 [2020-08-22 06:16:33,341 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:16:33,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=939, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 06:16:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:16:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:16:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:16:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:16:33,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-08-22 06:16:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:16:33,346 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:16:33,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 06:16:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:16:33,347 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:16:33,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 06:16:33,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:16:33,468 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 06:16:33,468 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:16:33,468 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:16:33,468 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 06:16:33,469 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 06:16:33,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 06:16:33,469 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-08-22 06:16:33,469 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 06:16:33,469 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 06:16:33,469 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-22 06:16:33,469 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-08-22 06:16:33,470 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 15) (<= 15 main_~input~0)) [2020-08-22 06:16:33,470 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-22 06:16:33,470 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-08-22 06:16:33,470 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-08-22 06:16:33,470 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-08-22 06:16:33,470 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-08-22 06:16:33,470 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-22 06:16:33,471 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 06:16:33,471 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-22 06:16:33,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:16:33 BoogieIcfgContainer [2020-08-22 06:16:33,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:16:33,480 INFO L168 Benchmark]: Toolchain (without parser) took 11683.68 ms. Allocated memory was 140.5 MB in the beginning and 397.9 MB in the end (delta: 257.4 MB). Free memory was 103.8 MB in the beginning and 173.3 MB in the end (delta: -69.5 MB). Peak memory consumption was 187.9 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:33,480 INFO L168 Benchmark]: CDTParser took 0.20 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 06:16:33,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.71 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:33,482 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 ms. Allocated memory is still 140.5 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:33,482 INFO L168 Benchmark]: RCFGBuilder took 300.73 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 171.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:33,483 INFO L168 Benchmark]: TraceAbstraction took 11125.89 ms. Allocated memory was 202.9 MB in the beginning and 397.9 MB in the end (delta: 195.0 MB). Free memory was 170.7 MB in the beginning and 173.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 192.5 MB. Max. memory is 7.1 GB. [2020-08-22 06:16:33,486 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.71 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.22 ms. Allocated memory is still 140.5 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.73 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 171.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11125.89 ms. Allocated memory was 202.9 MB in the beginning and 397.9 MB in the end (delta: 195.0 MB). Free memory was 170.7 MB in the beginning and 173.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 192.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.9s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 284 SDtfs, 396 SDslu, 2152 SDs, 0 SdLazy, 2096 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 39 PreInvPairs, 39 NumberOfFragments, 15 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 181 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1037 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1020 ConstructedInterpolants, 0 QuantifiedInterpolants, 203208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 2672/4624 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...