/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:07:57,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:07:57,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:07:57,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:07:57,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:07:57,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:07:57,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:07:57,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:07:57,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:07:57,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:07:57,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:07:57,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:07:57,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:07:57,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:07:57,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:07:57,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:07:57,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:07:57,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:07:57,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:07:57,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:07:57,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:07:57,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:07:57,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:07:57,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:07:57,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:07:57,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:07:57,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:07:57,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:07:57,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:07:57,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:07:57,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:07:57,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:07:57,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:07:57,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:07:57,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:07:57,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:07:57,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:07:57,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:07:57,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:07:57,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:07:57,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:07:57,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:07:57,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:07:57,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:07:57,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:07:57,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:07:57,662 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:07:57,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:07:57,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:07:57,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:07:57,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:07:57,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:07:57,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:07:57,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:07:57,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:07:57,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:07:57,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:07:57,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:07:57,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:07:57,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:07:57,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:07:57,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:07:57,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:07:57,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:07:57,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:07:57,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:07:57,670 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:07:58,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:07:58,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:07:58,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:07:58,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:07:58,053 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:07:58,053 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-21 18:07:58,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ad44bcbb/c823805472324cd6a3bcdb212bb10af7/FLAG8a6ff7f03 [2020-08-21 18:07:58,610 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:07:58,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-21 18:07:58,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ad44bcbb/c823805472324cd6a3bcdb212bb10af7/FLAG8a6ff7f03 [2020-08-21 18:07:58,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ad44bcbb/c823805472324cd6a3bcdb212bb10af7 [2020-08-21 18:07:58,965 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:07:58,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:07:58,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:07:58,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:07:58,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:07:58,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:07:58" (1/1) ... [2020-08-21 18:07:58,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47211fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:58, skipping insertion in model container [2020-08-21 18:07:58,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:07:58" (1/1) ... [2020-08-21 18:07:58,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:07:59,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:07:59,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:07:59,187 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:07:59,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:07:59,217 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:07:59,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59 WrapperNode [2020-08-21 18:07:59,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:07:59,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:07:59,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:07:59,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:07:59,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... [2020-08-21 18:07:59,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:07:59,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:07:59,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:07:59,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:07:59,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:07:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:07:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:07:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-21 18:07:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:07:59,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:07:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:07:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-21 18:07:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:07:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:07:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:07:59,593 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:07:59,593 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:07:59,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:07:59 BoogieIcfgContainer [2020-08-21 18:07:59,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:07:59,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:07:59,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:07:59,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:07:59,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:07:58" (1/3) ... [2020-08-21 18:07:59,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:07:59, skipping insertion in model container [2020-08-21 18:07:59,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:07:59" (2/3) ... [2020-08-21 18:07:59,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:07:59, skipping insertion in model container [2020-08-21 18:07:59,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:07:59" (3/3) ... [2020-08-21 18:07:59,606 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-21 18:07:59,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:07:59,624 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:07:59,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:07:59,661 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:07:59,662 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:07:59,662 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:07:59,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:07:59,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:07:59,662 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:07:59,663 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:07:59,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:07:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 18:07:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:07:59,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:07:59,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:07:59,687 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:07:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:07:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-21 18:07:59,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:07:59,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267340557] [2020-08-21 18:07:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:07:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:07:59,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:07:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:07:59,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:07:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:07:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:07:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267340557] [2020-08-21 18:07:59,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:07:59,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:07:59,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607663342] [2020-08-21 18:07:59,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:07:59,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:07:59,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:07:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:07:59,952 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-21 18:08:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:00,059 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-21 18:08:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:08:00,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 18:08:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:00,073 INFO L225 Difference]: With dead ends: 35 [2020-08-21 18:08:00,074 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 18:08:00,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:08:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 18:08:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 18:08:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:08:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-21 18:08:00,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-21 18:08:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:00,125 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-21 18:08:00,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:08:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-21 18:08:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:08:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:00,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:00,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:08:00,129 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-21 18:08:00,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:00,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584909926] [2020-08-21 18:08:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:08:00,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584909926] [2020-08-21 18:08:00,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:08:00,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:08:00,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584699124] [2020-08-21 18:08:00,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:08:00,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:08:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:08:00,212 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-21 18:08:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:00,275 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-21 18:08:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:08:00,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 18:08:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:00,278 INFO L225 Difference]: With dead ends: 27 [2020-08-21 18:08:00,278 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 18:08:00,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:08:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 18:08:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-21 18:08:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 18:08:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-21 18:08:00,288 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-21 18:08:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:00,289 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-21 18:08:00,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:08:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-21 18:08:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:08:00,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:00,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:00,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:08:00,292 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-21 18:08:00,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:00,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373810977] [2020-08-21 18:08:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:08:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 18:08:00,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373810977] [2020-08-21 18:08:00,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:00,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:08:00,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685678615] [2020-08-21 18:08:00,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:08:00,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:08:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:08:00,435 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-21 18:08:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:00,538 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-21 18:08:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:08:00,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 18:08:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:00,540 INFO L225 Difference]: With dead ends: 38 [2020-08-21 18:08:00,540 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 18:08:00,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:08:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 18:08:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-21 18:08:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 18:08:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-21 18:08:00,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-21 18:08:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:00,551 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-21 18:08:00,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:08:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-21 18:08:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:08:00,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:00,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:00,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:08:00,554 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-21 18:08:00,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:00,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938785927] [2020-08-21 18:08:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 18:08:00,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938785927] [2020-08-21 18:08:00,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:00,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:08:00,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618426664] [2020-08-21 18:08:00,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:08:00,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:08:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:08:00,661 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-21 18:08:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:00,785 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-21 18:08:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:08:00,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-21 18:08:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:00,788 INFO L225 Difference]: With dead ends: 41 [2020-08-21 18:08:00,788 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 18:08:00,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:08:00,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 18:08:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-21 18:08:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 18:08:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-21 18:08:00,801 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-21 18:08:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:00,802 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-21 18:08:00,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:08:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-21 18:08:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 18:08:00,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:00,805 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:00,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:08:00,805 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-21 18:08:00,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:00,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089377881] [2020-08-21 18:08:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:00,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 18:08:01,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089377881] [2020-08-21 18:08:01,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:01,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:08:01,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374717604] [2020-08-21 18:08:01,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:08:01,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:08:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:08:01,076 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-21 18:08:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:01,218 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-21 18:08:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:08:01,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 18:08:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:01,221 INFO L225 Difference]: With dead ends: 79 [2020-08-21 18:08:01,221 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 18:08:01,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:08:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 18:08:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-21 18:08:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 18:08:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-21 18:08:01,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-21 18:08:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:01,235 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-21 18:08:01,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:08:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-21 18:08:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 18:08:01,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:01,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:01,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:08:01,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-21 18:08:01,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748132656] [2020-08-21 18:08:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 18:08:01,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748132656] [2020-08-21 18:08:01,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:01,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:08:01,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898145588] [2020-08-21 18:08:01,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:08:01,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:08:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:08:01,349 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-21 18:08:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:01,462 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-21 18:08:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:08:01,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-21 18:08:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:01,465 INFO L225 Difference]: With dead ends: 65 [2020-08-21 18:08:01,465 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 18:08:01,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:08:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 18:08:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-21 18:08:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 18:08:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-21 18:08:01,480 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-21 18:08:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:01,481 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-21 18:08:01,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:08:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-21 18:08:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 18:08:01,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:01,485 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:01,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:08:01,486 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-21 18:08:01,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:01,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138278599] [2020-08-21 18:08:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:08:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-21 18:08:01,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138278599] [2020-08-21 18:08:01,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:01,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:08:01,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972594732] [2020-08-21 18:08:01,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:08:01,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:08:01,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:08:01,896 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-21 18:08:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:02,252 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-21 18:08:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:08:02,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-21 18:08:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:02,256 INFO L225 Difference]: With dead ends: 107 [2020-08-21 18:08:02,257 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 18:08:02,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:08:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 18:08:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 18:08:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 18:08:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-21 18:08:02,277 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-21 18:08:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:02,277 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-21 18:08:02,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:08:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-21 18:08:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 18:08:02,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:02,287 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:02,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:08:02,288 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:02,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-21 18:08:02,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:02,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039656740] [2020-08-21 18:08:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:08:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:08:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:08:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-21 18:08:02,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039656740] [2020-08-21 18:08:02,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:08:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659337807] [2020-08-21 18:08:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:08:02,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:08:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:08:02,751 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-21 18:08:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:03,143 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-21 18:08:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:08:03,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-21 18:08:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:03,146 INFO L225 Difference]: With dead ends: 114 [2020-08-21 18:08:03,146 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 18:08:03,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:08:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 18:08:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-21 18:08:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 18:08:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-21 18:08:03,158 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-21 18:08:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:03,159 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-21 18:08:03,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:08:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-21 18:08:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 18:08:03,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:03,160 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:03,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:08:03,161 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-21 18:08:03,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:03,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993903045] [2020-08-21 18:08:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:08:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:08:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-08-21 18:08:03,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993903045] [2020-08-21 18:08:03,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:03,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:08:03,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704342403] [2020-08-21 18:08:03,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:08:03,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:03,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:08:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:08:03,669 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 16 states. [2020-08-21 18:08:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:03,924 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-08-21 18:08:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:08:03,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-08-21 18:08:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:03,930 INFO L225 Difference]: With dead ends: 76 [2020-08-21 18:08:03,930 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 18:08:03,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:08:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 18:08:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-21 18:08:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 18:08:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-08-21 18:08:03,959 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 109 [2020-08-21 18:08:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:03,960 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-08-21 18:08:03,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:08:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-08-21 18:08:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 18:08:03,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:03,962 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:03,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:08:03,966 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 7 times [2020-08-21 18:08:03,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:03,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303960274] [2020-08-21 18:08:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:08:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:08:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 18:08:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 18:08:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 18:08:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:08:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-08-21 18:08:04,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303960274] [2020-08-21 18:08:04,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:04,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:08:04,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774673542] [2020-08-21 18:08:04,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:08:04,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:04,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:08:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:08:04,325 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2020-08-21 18:08:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:04,646 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-08-21 18:08:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:08:04,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-21 18:08:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:04,648 INFO L225 Difference]: With dead ends: 135 [2020-08-21 18:08:04,648 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:08:04,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:08:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:08:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:08:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:08:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:08:04,650 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-21 18:08:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:04,651 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:08:04,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:08:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:08:04,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:08:04,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:08:04,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:08:05,037 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-08-21 18:08:05,086 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:08:05,086 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:08:05,087 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:08:05,087 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:08:05,087 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:08:05,087 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:08:05,087 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-08-21 18:08:05,088 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-21 18:08:05,088 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-21 18:08:05,088 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-21 18:08:05,088 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-21 18:08:05,088 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-08-21 18:08:05,089 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-21 18:08:05,089 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-08-21 18:08:05,089 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-08-21 18:08:05,089 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-08-21 18:08:05,089 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-08-21 18:08:05,090 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-08-21 18:08:05,090 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-21 18:08:05,090 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3) .cse0) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 (<= 2 |fibo_#in~n|) .cse2 (<= |fibo_#in~n| 2) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-08-21 18:08:05,090 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-08-21 18:08:05,091 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-08-21 18:08:05,091 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-08-21 18:08:05,091 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-21 18:08:05,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:08:05 BoogieIcfgContainer [2020-08-21 18:08:05,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:08:05,108 INFO L168 Benchmark]: Toolchain (without parser) took 6139.10 ms. Allocated memory was 139.5 MB in the beginning and 293.6 MB in the end (delta: 154.1 MB). Free memory was 103.3 MB in the beginning and 97.7 MB in the end (delta: 5.6 MB). Peak memory consumption was 159.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,109 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.91 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,113 INFO L168 Benchmark]: Boogie Preprocessor took 33.36 ms. Allocated memory is still 139.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,117 INFO L168 Benchmark]: RCFGBuilder took 344.87 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 168.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,118 INFO L168 Benchmark]: TraceAbstraction took 5505.17 ms. Allocated memory was 201.3 MB in the beginning and 293.6 MB in the end (delta: 92.3 MB). Free memory was 168.6 MB in the beginning and 97.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 163.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:05,131 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.91 ms. Allocated memory is still 139.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.36 ms. Allocated memory is still 139.5 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.87 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 168.6 MB in the end (delta: -76.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5505.17 ms. Allocated memory was 201.3 MB in the beginning and 293.6 MB in the end (delta: 92.3 MB). Free memory was 168.6 MB in the beginning and 97.7 MB in the end (delta: 70.9 MB). Peak memory consumption was 163.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 262 SDslu, 932 SDs, 0 SdLazy, 999 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 137 PreInvPairs, 171 NumberOfFragments, 89 HoareAnnotationTreeSize, 137 FomulaSimplifications, 126 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 134010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1993/2854 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...