/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -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 [2020-08-19 05:11:12,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:11:12,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:11:12,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:11:12,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:11:12,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:11:12,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:11:12,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:11:12,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:11:12,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:11:12,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:11:12,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:11:12,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:11:12,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:11:12,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:11:12,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:11:12,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:11:12,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:11:12,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:11:12,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:11:12,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:11:12,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:11:12,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:11:12,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:11:12,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 05:11:12,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 05:11:12,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 05:11:12,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 05:11:12,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 05:11:12,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 05:11:12,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 05:11:12,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 05:11:12,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 05:11:12,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 05:11:12,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 05:11:12,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 05:11:12,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 05:11:12,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 05:11:12,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:11:12,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:11:12,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:11:12,932 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 [2020-08-19 05:11:12,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:11:12,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:11:12,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:11:12,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:11:12,994 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:11:12,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:11:12,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:11:12,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:11:12,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:11:12,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:11:12,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:11:12,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:11:12,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:11:12,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:11:12,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:11:12,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:11:12,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:11:12,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:11:12,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:11:12,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:11:12,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:11:12,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:11:12,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:11:12,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:11:12,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:11:12,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:11:13,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:11:13,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:11:13,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:11:13,001 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:11:13,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:11:13,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:11:13,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:11:13,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:11:13,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:11:13,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-19 05:11:13,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3748f735b/48671d7814c1495d848235be5a658643/FLAG300dc96b5 [2020-08-19 05:11:13,900 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:11:13,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-19 05:11:13,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3748f735b/48671d7814c1495d848235be5a658643/FLAG300dc96b5 [2020-08-19 05:11:14,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3748f735b/48671d7814c1495d848235be5a658643 [2020-08-19 05:11:14,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:11:14,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:11:14,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:11:14,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:11:14,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:11:14,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d644e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14, skipping insertion in model container [2020-08-19 05:11:14,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:11:14,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:11:14,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:11:14,524 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:11:14,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:11:14,551 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:11:14,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14 WrapperNode [2020-08-19 05:11:14,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:11:14,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:11:14,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:11:14,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:11:14,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (1/1) ... [2020-08-19 05:11:14,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:11:14,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:11:14,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:11:14,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:11:14,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (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 [2020-08-19 05:11:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:11:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:11:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 05:11:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:11:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:11:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:11:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 05:11:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:11:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:11:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:11:14,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:11:14,906 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:11:14,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:11:14 BoogieIcfgContainer [2020-08-19 05:11:14,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:11:14,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:11:14,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:11:14,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:11:14,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:11:14" (1/3) ... [2020-08-19 05:11:14,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2914c5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:11:14, skipping insertion in model container [2020-08-19 05:11:14,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:11:14" (2/3) ... [2020-08-19 05:11:14,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2914c5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:11:14, skipping insertion in model container [2020-08-19 05:11:14,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:11:14" (3/3) ... [2020-08-19 05:11:14,919 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-19 05:11:14,928 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:11:14,935 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:11:14,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:11:14,976 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:11:14,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:11:14,977 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:11:14,977 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:11:14,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:11:14,977 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:11:14,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:11:14,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:11:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 05:11:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:11:15,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:15,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:15,004 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 05:11:15,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:15,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528541554] [2020-08-19 05:11:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:11:15,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528541554] [2020-08-19 05:11:15,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:11:15,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:11:15,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500562277] [2020-08-19 05:11:15,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:11:15,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:11:15,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:11:15,302 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 05:11:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:15,381 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 05:11:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:11:15,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 05:11:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:15,398 INFO L225 Difference]: With dead ends: 30 [2020-08-19 05:11:15,398 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 05:11:15,407 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 [2020-08-19 05:11:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 05:11:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 05:11:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 05:11:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 05:11:15,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 05:11:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:15,472 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 05:11:15,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:11:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 05:11:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:11:15,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:15,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:15,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:11:15,483 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 05:11:15,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:15,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273498588] [2020-08-19 05:11:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:11:15,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273498588] [2020-08-19 05:11:15,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:15,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 05:11:15,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383787439] [2020-08-19 05:11:15,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:11:15,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:15,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:11:15,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:11:15,664 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 05:11:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:15,776 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 05:11:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:11:15,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 05:11:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:15,779 INFO L225 Difference]: With dead ends: 25 [2020-08-19 05:11:15,779 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 05:11:15,782 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 [2020-08-19 05:11:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 05:11:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 05:11:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 05:11:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 05:11:15,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 05:11:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:15,794 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 05:11:15,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:11:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 05:11:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:11:15,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:15,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:15,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:11:15,799 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 05:11:15,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:15,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258141922] [2020-08-19 05:11:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 05:11:15,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258141922] [2020-08-19 05:11:15,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:15,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:11:15,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577947001] [2020-08-19 05:11:15,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:11:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:11:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:11:15,972 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 05:11:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:16,036 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 05:11:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 05:11:16,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 05:11:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:16,038 INFO L225 Difference]: With dead ends: 28 [2020-08-19 05:11:16,038 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 05:11:16,039 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 [2020-08-19 05:11:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 05:11:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 05:11:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 05:11:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 05:11:16,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 05:11:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:16,047 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 05:11:16,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:11:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 05:11:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:11:16,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:16,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:16,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:11:16,050 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 05:11:16,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:16,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124589632] [2020-08-19 05:11:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 05:11:16,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124589632] [2020-08-19 05:11:16,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:16,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:11:16,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346742619] [2020-08-19 05:11:16,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:11:16,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:16,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:11:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:11:16,218 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 05:11:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:16,316 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 05:11:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:11:16,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 05:11:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:16,318 INFO L225 Difference]: With dead ends: 31 [2020-08-19 05:11:16,318 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 05:11:16,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:11:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 05:11:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 05:11:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 05:11:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 05:11:16,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 05:11:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:16,327 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 05:11:16,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:11:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 05:11:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 05:11:16,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:16,329 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:16,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:11:16,329 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 05:11:16,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:16,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31345035] [2020-08-19 05:11:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 05:11:16,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31345035] [2020-08-19 05:11:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 05:11:16,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971386399] [2020-08-19 05:11:16,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:11:16,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:11:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:11:16,509 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 05:11:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:16,593 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 05:11:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:11:16,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 05:11:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:16,595 INFO L225 Difference]: With dead ends: 34 [2020-08-19 05:11:16,596 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 05:11:16,596 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 [2020-08-19 05:11:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 05:11:16,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 05:11:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 05:11:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 05:11:16,603 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 05:11:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:16,604 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 05:11:16,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:11:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 05:11:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 05:11:16,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:16,606 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:16,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:11:16,606 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:16,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 05:11:16,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:16,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52207177] [2020-08-19 05:11:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 05:11:16,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52207177] [2020-08-19 05:11:16,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:16,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:11:16,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055102705] [2020-08-19 05:11:16,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:11:16,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:11:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:11:16,780 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 05:11:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:16,875 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 05:11:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:11:16,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 05:11:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:16,878 INFO L225 Difference]: With dead ends: 37 [2020-08-19 05:11:16,878 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 05:11:16,879 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 [2020-08-19 05:11:16,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 05:11:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 05:11:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 05:11:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 05:11:16,885 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 05:11:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:16,886 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 05:11:16,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:11:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 05:11:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 05:11:16,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:16,888 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:16,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:11:16,889 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 05:11:16,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:16,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483708391] [2020-08-19 05:11:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:16,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 05:11:17,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483708391] [2020-08-19 05:11:17,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:17,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 05:11:17,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687478236] [2020-08-19 05:11:17,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 05:11:17,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:17,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 05:11:17,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 05:11:17,079 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 05:11:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:17,189 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 05:11:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:11:17,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 05:11:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:17,191 INFO L225 Difference]: With dead ends: 40 [2020-08-19 05:11:17,191 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 05:11:17,192 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 [2020-08-19 05:11:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 05:11:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 05:11:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 05:11:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 05:11:17,198 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 05:11:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:17,199 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 05:11:17,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 05:11:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 05:11:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 05:11:17,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:17,200 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:17,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:11:17,201 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 05:11:17,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:17,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258006485] [2020-08-19 05:11:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 05:11:17,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258006485] [2020-08-19 05:11:17,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:17,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 05:11:17,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358672583] [2020-08-19 05:11:17,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:11:17,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:11:17,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:11:17,416 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 05:11:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:17,530 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 05:11:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:11:17,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 05:11:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:17,532 INFO L225 Difference]: With dead ends: 43 [2020-08-19 05:11:17,533 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 05:11:17,533 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 [2020-08-19 05:11:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 05:11:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 05:11:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 05:11:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 05:11:17,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 05:11:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:17,541 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 05:11:17,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:11:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 05:11:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 05:11:17,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:17,542 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:17,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:11:17,543 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:17,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 05:11:17,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:17,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41518839] [2020-08-19 05:11:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 05:11:17,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41518839] [2020-08-19 05:11:17,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:17,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 05:11:17,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986919500] [2020-08-19 05:11:17,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 05:11:17,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:17,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 05:11:17,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 05:11:17,816 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 05:11:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:17,946 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 05:11:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 05:11:17,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 05:11:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:17,948 INFO L225 Difference]: With dead ends: 46 [2020-08-19 05:11:17,948 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 05:11:17,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 05:11:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 05:11:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 05:11:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 05:11:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 05:11:17,956 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 05:11:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:17,957 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 05:11:17,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 05:11:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 05:11:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 05:11:17,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:17,959 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:17,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:11:17,959 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 05:11:17,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:17,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741395410] [2020-08-19 05:11:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:11:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:17,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:11:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:11:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:11:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 05:11:18,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741395410] [2020-08-19 05:11:18,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:11:18,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 05:11:18,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806424996] [2020-08-19 05:11:18,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 05:11:18,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:11:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 05:11:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:11:18,259 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 05:11:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:11:18,396 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 05:11:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 05:11:18,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 05:11:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:11:18,397 INFO L225 Difference]: With dead ends: 49 [2020-08-19 05:11:18,398 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 05:11:18,399 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 [2020-08-19 05:11:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 05:11:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 05:11:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 05:11:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 05:11:18,405 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 05:11:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:11:18,405 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 05:11:18,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 05:11:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 05:11:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 05:11:18,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:11:18,407 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:11:18,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:11:18,408 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:11:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:11:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 05:11:18,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:11:18,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68457173] [2020-08-19 05:11:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:11:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 05:11:18,424 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 05:11:18,424 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 05:11:18,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:11:18,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:11:18 BoogieIcfgContainer [2020-08-19 05:11:18,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:11:18,454 INFO L168 Benchmark]: Toolchain (without parser) took 4141.55 ms. Allocated memory was 138.4 MB in the beginning and 250.1 MB in the end (delta: 111.7 MB). Free memory was 101.5 MB in the beginning and 97.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 115.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:18,455 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:11:18,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.12 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 92.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:18,457 INFO L168 Benchmark]: Boogie Preprocessor took 116.43 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 179.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:18,458 INFO L168 Benchmark]: RCFGBuilder took 239.54 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:18,459 INFO L168 Benchmark]: TraceAbstraction took 3540.53 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.5 MB in the beginning and 97.3 MB in the end (delta: 70.2 MB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:11:18,462 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.12 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 92.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.43 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.0 MB in the beginning and 179.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.54 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3540.53 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.5 MB in the beginning and 97.3 MB in the end (delta: 70.2 MB). Peak memory consumption was 119.5 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: 3.4s, 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, 1.2s 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, 1.7s 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...