/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:28:02,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:02,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:02,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:02,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:02,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:02,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:02,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:02,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:02,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:02,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:02,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:02,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:02,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:02,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:02,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:02,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:02,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:02,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:02,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:02,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:02,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:02,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:02,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:02,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:28:02,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:28:02,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:28:02,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:28:02,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:28:02,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 15:28:02,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:28:02,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:28:02,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:28:02,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:28:02,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:28:02,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:28:02,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:28:02,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:28:02,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:02,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:02,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:02,530 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 [2020-08-18 15:28:02,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:02,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:02,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:02,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:02,580 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:02,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:02,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:02,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:02,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:02,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:02,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:02,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:02,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:02,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:02,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:02,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:02,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:02,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:02,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:02,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:02,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:02,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:02,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:02,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:02,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:02,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:02,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:02,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:02,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:02,587 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 -> false [2020-08-18 15:28:02,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:02,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:02,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:02,921 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:02,921 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:02,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-18 15:28:02,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52f7efb5/653b0b3569df423a86e19aaf51121400/FLAGbaa0b4e37 [2020-08-18 15:28:03,452 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:03,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-18 15:28:03,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52f7efb5/653b0b3569df423a86e19aaf51121400/FLAGbaa0b4e37 [2020-08-18 15:28:03,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52f7efb5/653b0b3569df423a86e19aaf51121400 [2020-08-18 15:28:03,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:03,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:03,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:03,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:03,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:03,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:03" (1/1) ... [2020-08-18 15:28:03,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145c9163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:03, skipping insertion in model container [2020-08-18 15:28:03,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:03" (1/1) ... [2020-08-18 15:28:03,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:03,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:04,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:04,056 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:04,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:04,086 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:04,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04 WrapperNode [2020-08-18 15:28:04,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:04,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:04,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:04,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:04,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (1/1) ... [2020-08-18 15:28:04,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:04,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:04,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:04,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:04,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (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 [2020-08-18 15:28:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 15:28:04,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:04,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:28:04,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 15:28:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:04,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:04,449 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:04,450 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 15:28:04,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:04 BoogieIcfgContainer [2020-08-18 15:28:04,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:04,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:04,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:04,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:04,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:03" (1/3) ... [2020-08-18 15:28:04,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46862b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:04, skipping insertion in model container [2020-08-18 15:28:04,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:04" (2/3) ... [2020-08-18 15:28:04,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46862b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:04, skipping insertion in model container [2020-08-18 15:28:04,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:04" (3/3) ... [2020-08-18 15:28:04,462 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-18 15:28:04,474 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:04,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:04,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:04,528 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:04,529 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:04,529 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:04,529 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:04,529 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:04,530 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:04,530 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:04,530 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 15:28:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 15:28:04,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:04,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:04,554 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-18 15:28:04,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:04,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524316721] [2020-08-18 15:28:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:04,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:04,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524316721] [2020-08-18 15:28:04,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:04,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:28:04,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144222818] [2020-08-18 15:28:04,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:28:04,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:28:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:28:04,920 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-18 15:28:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:05,004 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-18 15:28:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:28:05,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 15:28:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:05,027 INFO L225 Difference]: With dead ends: 30 [2020-08-18 15:28:05,027 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 15:28:05,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:28:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 15:28:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 15:28:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 15:28:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 15:28:05,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 15:28:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:05,094 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 15:28:05,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:28:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 15:28:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:05,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:05,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:05,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:28:05,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-18 15:28:05,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:05,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758096235] [2020-08-18 15:28:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 15:28:05,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758096235] [2020-08-18 15:28:05,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:05,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 15:28:05,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582460969] [2020-08-18 15:28:05,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 15:28:05,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 15:28:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:28:05,255 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-18 15:28:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:05,339 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-18 15:28:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:28:05,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 15:28:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:05,341 INFO L225 Difference]: With dead ends: 25 [2020-08-18 15:28:05,342 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 15:28:05,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:28:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 15:28:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 15:28:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 15:28:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 15:28:05,352 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-18 15:28:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:05,353 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 15:28:05,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 15:28:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 15:28:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:05,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:05,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:05,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:28:05,357 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-18 15:28:05,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:05,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888094327] [2020-08-18 15:28:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 15:28:05,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888094327] [2020-08-18 15:28:05,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:05,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 15:28:05,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383888470] [2020-08-18 15:28:05,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 15:28:05,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:05,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 15:28:05,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 15:28:05,544 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-18 15:28:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:05,644 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-18 15:28:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 15:28:05,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 15:28:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:05,647 INFO L225 Difference]: With dead ends: 28 [2020-08-18 15:28:05,647 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 15:28:05,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:28:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 15:28:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-18 15:28:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 15:28:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-18 15:28:05,664 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-18 15:28:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:05,665 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-18 15:28:05,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 15:28:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-18 15:28:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:28:05,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:05,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:05,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:28:05,668 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-18 15:28:05,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:05,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9121420] [2020-08-18 15:28:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 15:28:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9121420] [2020-08-18 15:28:05,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:05,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:28:05,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713581059] [2020-08-18 15:28:05,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:28:05,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:28:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:28:05,850 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-18 15:28:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:05,950 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-18 15:28:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 15:28:05,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 15:28:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:05,952 INFO L225 Difference]: With dead ends: 31 [2020-08-18 15:28:05,952 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 15:28:05,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:28:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 15:28:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 15:28:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 15:28:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-18 15:28:05,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-18 15:28:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:05,960 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-18 15:28:05,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:28:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-18 15:28:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 15:28:05,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:05,962 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:05,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:28:05,963 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-18 15:28:05,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:05,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28240637] [2020-08-18 15:28:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:05,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-18 15:28:06,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28240637] [2020-08-18 15:28:06,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:06,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 15:28:06,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578579314] [2020-08-18 15:28:06,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 15:28:06,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:06,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 15:28:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 15:28:06,130 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-18 15:28:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:06,226 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-18 15:28:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:28:06,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-18 15:28:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:06,228 INFO L225 Difference]: With dead ends: 34 [2020-08-18 15:28:06,229 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 15:28:06,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:28:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 15:28:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 15:28:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:28:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-18 15:28:06,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-18 15:28:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:06,237 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-18 15:28:06,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 15:28:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-18 15:28:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 15:28:06,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:06,239 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:06,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:28:06,239 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-18 15:28:06,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:06,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690902911] [2020-08-18 15:28:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 15:28:06,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690902911] [2020-08-18 15:28:06,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:06,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:28:06,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774859768] [2020-08-18 15:28:06,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:28:06,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:06,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:28:06,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:28:06,442 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-18 15:28:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:06,533 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-18 15:28:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:28:06,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 15:28:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:06,535 INFO L225 Difference]: With dead ends: 37 [2020-08-18 15:28:06,535 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 15:28:06,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 15:28:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 15:28:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-18 15:28:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 15:28:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-18 15:28:06,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-18 15:28:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:06,543 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-18 15:28:06,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:28:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-18 15:28:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 15:28:06,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:06,546 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:06,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:28:06,546 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-18 15:28:06,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:06,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988898908] [2020-08-18 15:28:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 15:28:06,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988898908] [2020-08-18 15:28:06,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:06,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 15:28:06,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780670061] [2020-08-18 15:28:06,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 15:28:06,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 15:28:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 15:28:06,754 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-18 15:28:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:06,878 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-18 15:28:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 15:28:06,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-18 15:28:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:06,882 INFO L225 Difference]: With dead ends: 40 [2020-08-18 15:28:06,882 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 15:28:06,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-18 15:28:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 15:28:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-18 15:28:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:28:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-18 15:28:06,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-18 15:28:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:06,903 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-18 15:28:06,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 15:28:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-18 15:28:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 15:28:06,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:06,908 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:06,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:28:06,908 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-18 15:28:06,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:06,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268337346] [2020-08-18 15:28:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:06,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-18 15:28:07,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268337346] [2020-08-18 15:28:07,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:07,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 15:28:07,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073488583] [2020-08-18 15:28:07,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 15:28:07,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 15:28:07,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:28:07,225 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-18 15:28:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:07,359 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-18 15:28:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:28:07,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-18 15:28:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:07,361 INFO L225 Difference]: With dead ends: 43 [2020-08-18 15:28:07,362 INFO L226 Difference]: Without dead ends: 39 [2020-08-18 15:28:07,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-18 15:28:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-18 15:28:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-18 15:28:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-18 15:28:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-18 15:28:07,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-18 15:28:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:07,382 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-18 15:28:07,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 15:28:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-18 15:28:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 15:28:07,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:07,386 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:07,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:28:07,387 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-18 15:28:07,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:07,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732662009] [2020-08-18 15:28:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-18 15:28:07,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732662009] [2020-08-18 15:28:07,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:07,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 15:28:07,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635232987] [2020-08-18 15:28:07,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 15:28:07,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:07,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 15:28:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:28:07,712 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-18 15:28:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:07,850 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-18 15:28:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 15:28:07,851 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-18 15:28:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:07,853 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:28:07,853 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:28:07,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:28:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:28:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 15:28:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 15:28:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-18 15:28:07,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-18 15:28:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:07,869 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-18 15:28:07,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 15:28:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-18 15:28:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 15:28:07,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:07,873 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:07,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:28:07,874 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:07,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-18 15:28:07,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:07,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749528570] [2020-08-18 15:28:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 15:28:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:07,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 15:28:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-18 15:28:08,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749528570] [2020-08-18 15:28:08,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:28:08,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 15:28:08,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37597618] [2020-08-18 15:28:08,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 15:28:08,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:08,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 15:28:08,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:28:08,282 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-18 15:28:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:08,436 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-18 15:28:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 15:28:08,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 15:28:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:08,439 INFO L225 Difference]: With dead ends: 49 [2020-08-18 15:28:08,439 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 15:28:08,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-18 15:28:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 15:28:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-18 15:28:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-18 15:28:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-18 15:28:08,447 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-18 15:28:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:08,447 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-18 15:28:08,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 15:28:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-18 15:28:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 15:28:08,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:08,449 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:08,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:28:08,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-18 15:28:08,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:08,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697411575] [2020-08-18 15:28:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:28:08,464 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:28:08,465 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:28:08,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:28:08,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:28:08 BoogieIcfgContainer [2020-08-18 15:28:08,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:28:08,494 INFO L168 Benchmark]: Toolchain (without parser) took 4666.64 ms. Allocated memory was 141.0 MB in the beginning and 274.2 MB in the end (delta: 133.2 MB). Free memory was 103.5 MB in the beginning and 218.0 MB in the end (delta: -114.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:08,495 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:28:08,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.94 ms. Allocated memory is still 141.0 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:08,497 INFO L168 Benchmark]: Boogie Preprocessor took 27.66 ms. Allocated memory is still 141.0 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:08,497 INFO L168 Benchmark]: RCFGBuilder took 337.32 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 173.1 MB in the end (delta: -80.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:08,498 INFO L168 Benchmark]: TraceAbstraction took 4036.79 ms. Allocated memory was 205.0 MB in the beginning and 274.2 MB in the end (delta: 69.2 MB). Free memory was 173.1 MB in the beginning and 218.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:08,502 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.94 ms. Allocated memory is still 141.0 MB. Free memory was 103.1 MB in the beginning and 94.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.66 ms. Allocated memory is still 141.0 MB. Free memory was 94.0 MB in the beginning and 92.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.32 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 92.6 MB in the beginning and 173.1 MB in the end (delta: -80.5 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4036.79 ms. Allocated memory was 205.0 MB in the beginning and 274.2 MB in the end (delta: 69.2 MB). Free memory was 173.1 MB in the beginning and 218.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...