/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:27:57,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:27:57,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:27:57,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:27:57,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:27:57,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:27:57,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:27:57,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:27:57,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:27:57,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:27:57,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:27:57,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:27:57,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:27:57,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:27:57,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:27:57,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:27:57,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:27:57,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:27:57,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:27:57,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:27:57,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:27:57,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:27:57,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:27:57,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:27:57,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 05:27:57,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 05:27:57,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 05:27:57,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 05:27:57,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 05:27:57,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 05:27:57,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 05:27:57,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 05:27:57,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 05:27:57,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 05:27:57,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 05:27:57,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 05:27:57,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 05:27:57,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 05:27:57,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:27:57,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:27:57,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:27:57,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 05:27:57,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:27:57,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:27:57,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:27:57,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:27:57,895 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:27:57,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:27:57,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:27:57,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:27:57,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:27:57,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:27:57,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:27:57,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:27:57,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:27:57,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:27:57,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:27:57,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:27:57,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:27:57,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:27:57,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:27:57,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:27:57,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:27:57,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:27:57,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:27:57,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:27:57,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:27:58,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:27:58,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:27:58,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:27:58,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:27:58,195 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:27:58,196 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-22 05:27:58,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46e7a18b1/eb54ae2ed76b43c68eb7b6f872919bdf/FLAGf7b76d9f6 [2020-08-22 05:27:58,695 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:27:58,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-08-22 05:27:58,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46e7a18b1/eb54ae2ed76b43c68eb7b6f872919bdf/FLAGf7b76d9f6 [2020-08-22 05:27:59,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46e7a18b1/eb54ae2ed76b43c68eb7b6f872919bdf [2020-08-22 05:27:59,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:27:59,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:27:59,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:59,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:27:59,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:27:59,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d4521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59, skipping insertion in model container [2020-08-22 05:27:59,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:27:59,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:27:59,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:59,299 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:27:59,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:27:59,334 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:27:59,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59 WrapperNode [2020-08-22 05:27:59,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:27:59,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:27:59,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:27:59,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:27:59,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... [2020-08-22 05:27:59,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:27:59,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:27:59,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:27:59,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:27:59,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:27:59,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:27:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:27:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 05:27:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:27:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:27:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 05:27:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:27:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:27:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:27:59,709 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:27:59,709 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 05:27:59,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:59 BoogieIcfgContainer [2020-08-22 05:27:59,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:27:59,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:27:59,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:27:59,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:27:59,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:27:59" (1/3) ... [2020-08-22 05:27:59,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328f9b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:59, skipping insertion in model container [2020-08-22 05:27:59,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:27:59" (2/3) ... [2020-08-22 05:27:59,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328f9b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:27:59, skipping insertion in model container [2020-08-22 05:27:59,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:27:59" (3/3) ... [2020-08-22 05:27:59,725 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-08-22 05:27:59,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:27:59,743 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:27:59,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:27:59,778 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:27:59,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:27:59,778 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:27:59,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:27:59,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:27:59,779 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:27:59,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:27:59,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:27:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 05:27:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 05:27:59,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:27:59,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:27:59,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:27:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:27:59,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-22 05:27:59,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:27:59,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802247125] [2020-08-22 05:27:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:27:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802247125] [2020-08-22 05:28:00,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:00,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 05:28:00,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409244616] [2020-08-22 05:28:00,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:28:00,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:00,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:28:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:28:00,162 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 05:28:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:00,263 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 05:28:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:28:00,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 05:28:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:00,276 INFO L225 Difference]: With dead ends: 30 [2020-08-22 05:28:00,276 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 05:28:00,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:28:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 05:28:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 05:28:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 05:28:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 05:28:00,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 05:28:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:00,334 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 05:28:00,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:28:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 05:28:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 05:28:00,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:00,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:00,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:28:00,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-22 05:28:00,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:00,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073193231] [2020-08-22 05:28:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 05:28:00,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073193231] [2020-08-22 05:28:00,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:00,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 05:28:00,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293876682] [2020-08-22 05:28:00,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 05:28:00,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 05:28:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:28:00,490 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-22 05:28:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:00,564 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 05:28:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 05:28:00,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-22 05:28:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:00,567 INFO L225 Difference]: With dead ends: 25 [2020-08-22 05:28:00,567 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 05:28:00,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:28:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 05:28:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 05:28:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 05:28:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 05:28:00,575 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 05:28:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:00,576 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 05:28:00,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 05:28:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 05:28:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:00,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:00,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:00,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:28:00,578 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:00,579 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-08-22 05:28:00,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626021658] [2020-08-22 05:28:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 05:28:00,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626021658] [2020-08-22 05:28:00,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:00,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 05:28:00,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274761350] [2020-08-22 05:28:00,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 05:28:00,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 05:28:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 05:28:00,741 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-22 05:28:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:00,815 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 05:28:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 05:28:00,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-22 05:28:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:00,817 INFO L225 Difference]: With dead ends: 28 [2020-08-22 05:28:00,817 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 05:28:00,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:28:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 05:28:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 05:28:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 05:28:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 05:28:00,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 05:28:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:00,826 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 05:28:00,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 05:28:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 05:28:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:28:00,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:00,828 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:00,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:28:00,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:00,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-08-22 05:28:00,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:00,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002846043] [2020-08-22 05:28:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:00,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 05:28:01,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002846043] [2020-08-22 05:28:01,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:01,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 05:28:01,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718815590] [2020-08-22 05:28:01,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 05:28:01,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 05:28:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 05:28:01,047 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-22 05:28:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:01,127 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 05:28:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 05:28:01,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-22 05:28:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:01,129 INFO L225 Difference]: With dead ends: 31 [2020-08-22 05:28:01,129 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 05:28:01,130 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 [2020-08-22 05:28:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 05:28:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 05:28:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 05:28:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 05:28:01,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 05:28:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:01,137 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 05:28:01,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 05:28:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 05:28:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 05:28:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:01,139 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:01,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:28:01,139 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-08-22 05:28:01,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:01,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197555772] [2020-08-22 05:28:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 05:28:01,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197555772] [2020-08-22 05:28:01,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:01,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 05:28:01,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557655918] [2020-08-22 05:28:01,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 05:28:01,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 05:28:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 05:28:01,312 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-22 05:28:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:01,407 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 05:28:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 05:28:01,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-22 05:28:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:01,409 INFO L225 Difference]: With dead ends: 34 [2020-08-22 05:28:01,409 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 05:28:01,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:28:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 05:28:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 05:28:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 05:28:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 05:28:01,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 05:28:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:01,418 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 05:28:01,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 05:28:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 05:28:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 05:28:01,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:01,420 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:01,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:28:01,420 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-08-22 05:28:01,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:01,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759272170] [2020-08-22 05:28:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 05:28:01,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759272170] [2020-08-22 05:28:01,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:01,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 05:28:01,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879691880] [2020-08-22 05:28:01,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 05:28:01,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 05:28:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 05:28:01,692 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-22 05:28:01,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:01,837 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 05:28:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 05:28:01,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 05:28:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:01,842 INFO L225 Difference]: With dead ends: 37 [2020-08-22 05:28:01,842 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 05:28:01,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:28:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 05:28:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 05:28:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 05:28:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 05:28:01,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 05:28:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:01,857 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 05:28:01,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 05:28:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 05:28:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 05:28:01,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:01,865 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:01,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:28:01,866 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-08-22 05:28:01,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:01,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713818610] [2020-08-22 05:28:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 05:28:02,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713818610] [2020-08-22 05:28:02,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:02,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 05:28:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746407291] [2020-08-22 05:28:02,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 05:28:02,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 05:28:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 05:28:02,143 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-22 05:28:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:02,270 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 05:28:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 05:28:02,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-22 05:28:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:02,272 INFO L225 Difference]: With dead ends: 40 [2020-08-22 05:28:02,272 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 05:28:02,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:28:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 05:28:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 05:28:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 05:28:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 05:28:02,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 05:28:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:02,280 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 05:28:02,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 05:28:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 05:28:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 05:28:02,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:02,281 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:02,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:28:02,282 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-08-22 05:28:02,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:02,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914901345] [2020-08-22 05:28:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 05:28:02,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914901345] [2020-08-22 05:28:02,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:02,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 05:28:02,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508847275] [2020-08-22 05:28:02,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 05:28:02,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 05:28:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 05:28:02,500 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-22 05:28:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:02,634 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 05:28:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 05:28:02,635 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-22 05:28:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:02,636 INFO L225 Difference]: With dead ends: 43 [2020-08-22 05:28:02,636 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 05:28:02,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 05:28:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 05:28:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 05:28:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 05:28:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 05:28:02,644 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 05:28:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:02,644 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 05:28:02,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 05:28:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 05:28:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 05:28:02,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:02,646 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:02,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:28:02,646 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-08-22 05:28:02,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:02,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474631351] [2020-08-22 05:28:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 05:28:02,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474631351] [2020-08-22 05:28:02,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:02,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 05:28:02,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841736922] [2020-08-22 05:28:02,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 05:28:02,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 05:28:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 05:28:02,921 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-22 05:28:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:03,052 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 05:28:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 05:28:03,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-22 05:28:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:03,055 INFO L225 Difference]: With dead ends: 46 [2020-08-22 05:28:03,055 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 05:28:03,056 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 [2020-08-22 05:28:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 05:28:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 05:28:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 05:28:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 05:28:03,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 05:28:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:03,063 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 05:28:03,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 05:28:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 05:28:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 05:28:03,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:03,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:03,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:28:03,064 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-08-22 05:28:03,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:03,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417681320] [2020-08-22 05:28:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 05:28:03,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417681320] [2020-08-22 05:28:03,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:03,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 05:28:03,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102242258] [2020-08-22 05:28:03,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 05:28:03,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:03,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 05:28:03,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 05:28:03,390 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-22 05:28:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:03,524 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 05:28:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 05:28:03,525 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-22 05:28:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:03,526 INFO L225 Difference]: With dead ends: 49 [2020-08-22 05:28:03,527 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 05:28:03,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 05:28:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 05:28:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 05:28:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 05:28:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 05:28:03,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 05:28:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:03,534 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 05:28:03,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 05:28:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 05:28:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 05:28:03,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:03,535 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:03,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:28:03,536 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-08-22 05:28:03,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:03,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350022582] [2020-08-22 05:28:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 05:28:03,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350022582] [2020-08-22 05:28:03,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:03,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 05:28:03,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942807701] [2020-08-22 05:28:03,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 05:28:03,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 05:28:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 05:28:03,986 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2020-08-22 05:28:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:04,139 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 05:28:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 05:28:04,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-08-22 05:28:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:04,141 INFO L225 Difference]: With dead ends: 52 [2020-08-22 05:28:04,142 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 05:28:04,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 05:28:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 05:28:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 05:28:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 05:28:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 05:28:04,149 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 05:28:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:04,149 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 05:28:04,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 05:28:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 05:28:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 05:28:04,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:04,150 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:04,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:28:04,151 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-08-22 05:28:04,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:04,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900033626] [2020-08-22 05:28:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 05:28:04,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900033626] [2020-08-22 05:28:04,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:04,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 05:28:04,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694967583] [2020-08-22 05:28:04,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 05:28:04,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 05:28:04,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 05:28:04,590 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2020-08-22 05:28:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:04,764 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 05:28:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 05:28:04,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-08-22 05:28:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:04,765 INFO L225 Difference]: With dead ends: 55 [2020-08-22 05:28:04,766 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 05:28:04,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 05:28:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 05:28:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 05:28:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 05:28:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 05:28:04,772 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 05:28:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:04,773 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 05:28:04,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 05:28:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 05:28:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 05:28:04,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:04,775 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:04,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:28:04,775 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-08-22 05:28:04,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:04,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007039058] [2020-08-22 05:28:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:04,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 05:28:05,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007039058] [2020-08-22 05:28:05,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:05,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 05:28:05,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47847663] [2020-08-22 05:28:05,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 05:28:05,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 05:28:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 05:28:05,445 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2020-08-22 05:28:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:05,631 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 05:28:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 05:28:05,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-22 05:28:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:05,633 INFO L225 Difference]: With dead ends: 58 [2020-08-22 05:28:05,633 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 05:28:05,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 05:28:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 05:28:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 05:28:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 05:28:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 05:28:05,640 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 05:28:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:05,641 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 05:28:05,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 05:28:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 05:28:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 05:28:05,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:05,642 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:05,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:28:05,643 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-08-22 05:28:05,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:05,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534746358] [2020-08-22 05:28:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:05,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 05:28:06,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534746358] [2020-08-22 05:28:06,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:06,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 05:28:06,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164598716] [2020-08-22 05:28:06,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 05:28:06,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:06,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 05:28:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 05:28:06,194 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2020-08-22 05:28:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:06,405 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 05:28:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 05:28:06,406 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2020-08-22 05:28:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:06,407 INFO L225 Difference]: With dead ends: 61 [2020-08-22 05:28:06,407 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 05:28:06,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 05:28:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 05:28:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 05:28:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 05:28:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 05:28:06,414 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 05:28:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:06,414 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 05:28:06,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 05:28:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 05:28:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 05:28:06,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:06,416 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:06,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:28:06,416 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-08-22 05:28:06,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:06,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148631869] [2020-08-22 05:28:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 05:28:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 05:28:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 05:28:06,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148631869] [2020-08-22 05:28:06,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 05:28:06,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 05:28:06,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421070607] [2020-08-22 05:28:06,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 05:28:06,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 05:28:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 05:28:06,999 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2020-08-22 05:28:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:07,243 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 05:28:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 05:28:07,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 05:28:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:07,245 INFO L225 Difference]: With dead ends: 64 [2020-08-22 05:28:07,245 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 05:28:07,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 05:28:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 05:28:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 05:28:07,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 05:28:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 05:28:07,252 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 05:28:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:07,253 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 05:28:07,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 05:28:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 05:28:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 05:28:07,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:07,255 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:07,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 05:28:07,255 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-08-22 05:28:07,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:07,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812842854] [2020-08-22 05:28:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 05:28:07,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 05:28:07,288 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 05:28:07,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 05:28:07,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:28:07 BoogieIcfgContainer [2020-08-22 05:28:07,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:28:07,321 INFO L168 Benchmark]: Toolchain (without parser) took 8229.24 ms. Allocated memory was 140.5 MB in the beginning and 333.4 MB in the end (delta: 192.9 MB). Free memory was 104.2 MB in the beginning and 204.4 MB in the end (delta: -100.2 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:07,322 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 05:28:07,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.77 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:07,323 INFO L168 Benchmark]: Boogie Preprocessor took 31.74 ms. Allocated memory is still 140.5 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:07,324 INFO L168 Benchmark]: RCFGBuilder took 345.12 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 93.3 MB in the beginning and 173.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:07,324 INFO L168 Benchmark]: TraceAbstraction took 7603.89 ms. Allocated memory was 205.5 MB in the beginning and 333.4 MB in the end (delta: 127.9 MB). Free memory was 173.2 MB in the beginning and 204.4 MB in the end (delta: -31.2 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:07,328 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.77 ms. Allocated memory is still 140.5 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.74 ms. Allocated memory is still 140.5 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.12 ms. Allocated memory was 140.5 MB in the beginning and 205.5 MB in the end (delta: 65.0 MB). Free memory was 93.3 MB in the beginning and 173.9 MB in the end (delta: -80.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7603.89 ms. Allocated memory was 205.5 MB in the beginning and 333.4 MB in the end (delta: 127.9 MB). Free memory was 173.2 MB in the beginning and 204.4 MB in the end (delta: -31.2 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; [L14] CALL, EXPR sum(a, b) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND FALSE !(n <= 0) [L7] CALL, EXPR sum(n - 1, m + 1) [L4] COND TRUE n <= 0 [L5] return m + n; [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.5s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 318 SDslu, 711 SDs, 0 SdLazy, 522 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, 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, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 810 ConstructedInterpolants, 0 QuantifiedInterpolants, 133800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 1575/3150 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...