/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=0.2 --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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:48:36,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:48:36,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:48:36,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:48:36,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:48:36,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:48:36,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:48:36,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:48:36,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:48:36,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:48:36,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:48:36,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:48:36,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:48:36,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:48:36,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:48:36,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:48:36,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:48:36,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:48:36,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:48:36,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:48:36,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:48:36,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:48:36,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:48:36,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:48:36,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:48:36,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:48:36,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:48:36,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:48:36,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:48:36,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:48:36,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:48:36,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:48:36,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:48:36,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:48:36,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:48:36,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:48:36,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:48:36,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:48:36,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:48:36,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:48:36,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:48:36,499 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 03:48:36,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:48:36,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:48:36,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:48:36,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:48:36,545 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:48:36,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:48:36,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:48:36,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:48:36,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:48:36,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:48:36,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:48:36,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:48:36,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:48:36,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:48:36,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:48:36,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:48:36,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:48:36,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:48:36,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:48:36,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:48:36,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:48:36,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:48:36,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:48:36,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:48:36,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:48:36,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:48:36,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:48:36,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:48:36,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:48:36,551 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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-08-22 03:48:36,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:48:36,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:48:36,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:48:36,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:48:36,859 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:48:36,860 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-22 03:48:36,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2635dce56/15ada8d5e66442c699452c9f1bb944c7/FLAGac454055a [2020-08-22 03:48:37,340 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:48:37,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-22 03:48:37,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2635dce56/15ada8d5e66442c699452c9f1bb944c7/FLAGac454055a [2020-08-22 03:48:37,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2635dce56/15ada8d5e66442c699452c9f1bb944c7 [2020-08-22 03:48:37,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:48:37,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:48:37,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:48:37,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:48:37,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:48:37,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8d9ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37, skipping insertion in model container [2020-08-22 03:48:37,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:48:37,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:48:37,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:48:37,917 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:48:37,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:48:37,948 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:48:37,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37 WrapperNode [2020-08-22 03:48:37,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:48:37,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:48:37,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:48:37,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:48:37,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (1/1) ... [2020-08-22 03:48:37,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:48:37,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:48:37,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:48:37,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:48:37,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (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 03:48:38,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:48:38,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:48:38,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-08-22 03:48:38,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:48:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:48:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:48:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-08-22 03:48:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:48:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:48:38,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:48:38,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:48:38,496 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:48:38,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:48:38 BoogieIcfgContainer [2020-08-22 03:48:38,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:48:38,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:48:38,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:48:38,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:48:38,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:48:37" (1/3) ... [2020-08-22 03:48:38,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578adc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:48:38, skipping insertion in model container [2020-08-22 03:48:38,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:48:37" (2/3) ... [2020-08-22 03:48:38,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578adc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:48:38, skipping insertion in model container [2020-08-22 03:48:38,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:48:38" (3/3) ... [2020-08-22 03:48:38,514 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-08-22 03:48:38,525 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:48:38,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:48:38,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:48:38,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:48:38,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:48:38,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:48:38,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:48:38,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:48:38,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:48:38,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:48:38,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:48:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 03:48:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 03:48:38,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:38,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:38,601 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:38,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-08-22 03:48:38,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:38,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538188893] [2020-08-22 03:48:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:38,871 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 03:48:38,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538188893] [2020-08-22 03:48:38,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:48:38,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 03:48:38,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541931070] [2020-08-22 03:48:38,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:48:38,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:48:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:38,900 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-08-22 03:48:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:39,082 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-22 03:48:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:48:39,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-22 03:48:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:39,096 INFO L225 Difference]: With dead ends: 41 [2020-08-22 03:48:39,096 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 03:48:39,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 03:48:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 03:48:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 03:48:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-22 03:48:39,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-08-22 03:48:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:39,150 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-22 03:48:39,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:48:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-22 03:48:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:48:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:39,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:48:39,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-08-22 03:48:39,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:39,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511809337] [2020-08-22 03:48:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 03:48:39,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511809337] [2020-08-22 03:48:39,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:48:39,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 03:48:39,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615060090] [2020-08-22 03:48:39,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:48:39,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:48:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:48:39,328 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-08-22 03:48:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:39,508 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-08-22 03:48:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:48:39,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-08-22 03:48:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:39,511 INFO L225 Difference]: With dead ends: 32 [2020-08-22 03:48:39,511 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 03:48:39,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:48:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 03:48:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-22 03:48:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 03:48:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-08-22 03:48:39,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-08-22 03:48:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:39,522 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-08-22 03:48:39,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:48:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-08-22 03:48:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 03:48:39,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:39,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:39,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:48:39,525 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-08-22 03:48:39,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:39,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108857692] [2020-08-22 03:48:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:48:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 03:48:39,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108857692] [2020-08-22 03:48:39,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:39,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 03:48:39,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759039362] [2020-08-22 03:48:39,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:48:39,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:48:39,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:39,634 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-08-22 03:48:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:39,702 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-08-22 03:48:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:48:39,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 03:48:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:39,705 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:48:39,705 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 03:48:39,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 03:48:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 03:48:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 03:48:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-08-22 03:48:39,715 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-08-22 03:48:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:39,716 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-08-22 03:48:39,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:48:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-08-22 03:48:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 03:48:39,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:39,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:39,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:48:39,719 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-08-22 03:48:39,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:39,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166852231] [2020-08-22 03:48:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:39,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:48:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-22 03:48:40,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166852231] [2020-08-22 03:48:40,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:40,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:48:40,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052520996] [2020-08-22 03:48:40,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:48:40,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:40,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:48:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:48:40,005 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 13 states. [2020-08-22 03:48:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:40,523 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2020-08-22 03:48:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:48:40,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-08-22 03:48:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:40,528 INFO L225 Difference]: With dead ends: 54 [2020-08-22 03:48:40,529 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 03:48:40,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-08-22 03:48:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 03:48:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-08-22 03:48:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:48:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2020-08-22 03:48:40,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2020-08-22 03:48:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:40,546 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2020-08-22 03:48:40,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:48:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2020-08-22 03:48:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 03:48:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:40,549 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:40,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:48:40,549 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2020-08-22 03:48:40,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:40,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471817295] [2020-08-22 03:48:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:48:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-22 03:48:40,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471817295] [2020-08-22 03:48:40,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:40,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:48:40,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963398008] [2020-08-22 03:48:40,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:48:40,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:40,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:48:40,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:40,786 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 14 states. [2020-08-22 03:48:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:41,321 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2020-08-22 03:48:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:48:41,322 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-08-22 03:48:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:41,327 INFO L225 Difference]: With dead ends: 65 [2020-08-22 03:48:41,327 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 03:48:41,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2020-08-22 03:48:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 03:48:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-08-22 03:48:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 03:48:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-08-22 03:48:41,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2020-08-22 03:48:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:41,349 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-08-22 03:48:41,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:48:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-08-22 03:48:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 03:48:41,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:41,352 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:41,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:48:41,352 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2020-08-22 03:48:41,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:41,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227637888] [2020-08-22 03:48:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:48:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 03:48:41,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227637888] [2020-08-22 03:48:41,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:41,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:48:41,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201224293] [2020-08-22 03:48:41,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:48:41,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:48:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:48:41,466 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 7 states. [2020-08-22 03:48:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:41,626 INFO L93 Difference]: Finished difference Result 75 states and 128 transitions. [2020-08-22 03:48:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:48:41,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-22 03:48:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:41,629 INFO L225 Difference]: With dead ends: 75 [2020-08-22 03:48:41,629 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 03:48:41,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:48:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 03:48:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 03:48:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 03:48:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 74 transitions. [2020-08-22 03:48:41,656 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 74 transitions. Word has length 42 [2020-08-22 03:48:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:41,657 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 74 transitions. [2020-08-22 03:48:41,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:48:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 74 transitions. [2020-08-22 03:48:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 03:48:41,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:41,660 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:41,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:48:41,660 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 579008339, now seen corresponding path program 4 times [2020-08-22 03:48:41,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:41,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455719764] [2020-08-22 03:48:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:48:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-22 03:48:41,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455719764] [2020-08-22 03:48:41,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:41,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 03:48:41,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835314074] [2020-08-22 03:48:41,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 03:48:41,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:41,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 03:48:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 03:48:41,734 INFO L87 Difference]: Start difference. First operand 49 states and 74 transitions. Second operand 4 states. [2020-08-22 03:48:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:41,776 INFO L93 Difference]: Finished difference Result 91 states and 165 transitions. [2020-08-22 03:48:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 03:48:41,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-08-22 03:48:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:41,778 INFO L225 Difference]: With dead ends: 91 [2020-08-22 03:48:41,778 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 03:48:41,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:48:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 03:48:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-08-22 03:48:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 03:48:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-08-22 03:48:41,791 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 56 [2020-08-22 03:48:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:41,792 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-08-22 03:48:41,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 03:48:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-08-22 03:48:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 03:48:41,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:48:41,795 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:48:41,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:48:41,795 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:48:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:48:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 5 times [2020-08-22 03:48:41,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:48:41,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000811785] [2020-08-22 03:48:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:48:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:48:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 03:48:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 03:48:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 03:48:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:48:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:48:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-22 03:48:42,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000811785] [2020-08-22 03:48:42,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:48:42,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 03:48:42,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477374642] [2020-08-22 03:48:42,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 03:48:42,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:48:42,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 03:48:42,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:48:42,013 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 14 states. [2020-08-22 03:48:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:48:42,592 INFO L93 Difference]: Finished difference Result 95 states and 184 transitions. [2020-08-22 03:48:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 03:48:42,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-22 03:48:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:48:42,594 INFO L225 Difference]: With dead ends: 95 [2020-08-22 03:48:42,595 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:48:42,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-08-22 03:48:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:48:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:48:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:48:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:48:42,598 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-22 03:48:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:48:42,598 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:48:42,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 03:48:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:48:42,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:48:42,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:48:42,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:48:42,926 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-08-22 03:48:42,970 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:48:42,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:48:42,970 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:48:42,971 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:48:42,971 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:48:42,971 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:48:42,971 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-08-22 03:48:42,971 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-22 03:48:42,972 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-08-22 03:48:42,972 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-08-22 03:48:42,972 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-22 03:48:42,972 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse3 (<= 3 |ackermann_#t~ret1|))) (and (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse1 .cse2))) (or (= |ackermann_#in~n| 1) .cse3 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))))) [2020-08-22 03:48:42,973 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-22 03:48:42,973 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-22 03:48:42,973 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-08-22 03:48:42,974 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-22 03:48:42,974 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-08-22 03:48:42,974 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-08-22 03:48:42,974 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-08-22 03:48:42,974 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-08-22 03:48:42,975 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-08-22 03:48:42,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:48:42 BoogieIcfgContainer [2020-08-22 03:48:42,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:48:42,986 INFO L168 Benchmark]: Toolchain (without parser) took 5257.95 ms. Allocated memory was 141.0 MB in the beginning and 274.2 MB in the end (delta: 133.2 MB). Free memory was 104.8 MB in the beginning and 126.7 MB in the end (delta: -21.9 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:48:42,988 INFO L168 Benchmark]: CDTParser took 0.74 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:48:42,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.32 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:48:42,990 INFO L168 Benchmark]: Boogie Preprocessor took 23.83 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 03:48:42,991 INFO L168 Benchmark]: RCFGBuilder took 528.74 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 170.8 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 03:48:42,997 INFO L168 Benchmark]: TraceAbstraction took 4476.78 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 170.1 MB in the beginning and 126.7 MB in the end (delta: 43.4 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. [2020-08-22 03:48:43,008 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.32 ms. Allocated memory is still 141.0 MB. Free memory was 104.3 MB in the beginning and 94.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.83 ms. Allocated memory is still 141.0 MB. Free memory was 94.9 MB in the beginning and 93.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 528.74 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 170.8 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4476.78 ms. Allocated memory was 203.9 MB in the beginning and 274.2 MB in the end (delta: 70.3 MB). Free memory was 170.1 MB in the beginning and 126.7 MB in the end (delta: 43.4 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 179 SDtfs, 134 SDslu, 703 SDs, 0 SdLazy, 1286 SolverSat, 203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=7, 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, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 152 NumberOfFragments, 80 HoareAnnotationTreeSize, 125 FomulaSimplifications, 7084 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 24252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 294/369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...