/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:49:08,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:49:08,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:49:09,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:49:09,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:49:09,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:49:09,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:49:09,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:49:09,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:49:09,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:49:09,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:49:09,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:49:09,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:49:09,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:49:09,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:49:09,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:49:09,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:49:09,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:49:09,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:49:09,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:49:09,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:49:09,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:49:09,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:49:09,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:49:09,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:49:09,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:49:09,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:49:09,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:49:09,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:49:09,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:49:09,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:49:09,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:49:09,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:49:09,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:49:09,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:49:09,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:49:09,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:49:09,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:49:09,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:49:09,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:49:09,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:49:09,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:49:09,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:49:09,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:49:09,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:49:09,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:49:09,084 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:49:09,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:49:09,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:49:09,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:49:09,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:49:09,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:49:09,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:49:09,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:49:09,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:49:09,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:49:09,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:49:09,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:49:09,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:49:09,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:49:09,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:49:09,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:49:09,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:49:09,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:09,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:49:09,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:49:09,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:49:09,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:49:09,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:49:09,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:49:09,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:49:09,436 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:49:09,437 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 06:49:09,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34576538b/7cd8c9fdfb934c6d8bc58d278a4f75e6/FLAG7bbe00808 [2020-08-19 06:49:09,959 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:49:09,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 06:49:09,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34576538b/7cd8c9fdfb934c6d8bc58d278a4f75e6/FLAG7bbe00808 [2020-08-19 06:49:10,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34576538b/7cd8c9fdfb934c6d8bc58d278a4f75e6 [2020-08-19 06:49:10,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:49:10,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:49:10,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:10,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:49:10,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:49:10,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10, skipping insertion in model container [2020-08-19 06:49:10,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:49:10,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:49:10,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:10,578 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:49:10,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:49:10,615 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:49:10,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10 WrapperNode [2020-08-19 06:49:10,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:49:10,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:49:10,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:49:10,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:49:10,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... [2020-08-19 06:49:10,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:49:10,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:49:10,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:49:10,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:49:10,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:49:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:49:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:49:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:49:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:49:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:49:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:49:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:49:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:49:11,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:49:11,005 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 06:49:11,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:11 BoogieIcfgContainer [2020-08-19 06:49:11,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:49:11,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:49:11,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:49:11,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:49:11,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:49:10" (1/3) ... [2020-08-19 06:49:11,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a87f9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:11, skipping insertion in model container [2020-08-19 06:49:11,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:49:10" (2/3) ... [2020-08-19 06:49:11,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a87f9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:49:11, skipping insertion in model container [2020-08-19 06:49:11,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:49:11" (3/3) ... [2020-08-19 06:49:11,018 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-19 06:49:11,040 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:49:11,064 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:49:11,101 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:49:11,133 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:49:11,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:49:11,133 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:49:11,133 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:49:11,134 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:49:11,134 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:49:11,134 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:49:11,134 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:49:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-19 06:49:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 06:49:11,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,162 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-19 06:49:11,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794182832] [2020-08-19 06:49:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794182832] [2020-08-19 06:49:11,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159360789] [2020-08-19 06:49:11,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,381 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-19 06:49:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,458 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-19 06:49:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 06:49:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,472 INFO L225 Difference]: With dead ends: 57 [2020-08-19 06:49:11,473 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 06:49:11,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 06:49:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-19 06:49:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:49:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-19 06:49:11,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-19 06:49:11,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,523 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-19 06:49:11,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-19 06:49:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 06:49:11,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:49:11,526 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-19 06:49:11,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222167051] [2020-08-19 06:49:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222167051] [2020-08-19 06:49:11,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35375525] [2020-08-19 06:49:11,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,582 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-19 06:49:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,605 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-19 06:49:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 06:49:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,607 INFO L225 Difference]: With dead ends: 67 [2020-08-19 06:49:11,608 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 06:49:11,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 06:49:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-19 06:49:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 06:49:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-19 06:49:11,622 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-19 06:49:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,622 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-19 06:49:11,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-19 06:49:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 06:49:11,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:49:11,624 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-19 06:49:11,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347841164] [2020-08-19 06:49:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347841164] [2020-08-19 06:49:11,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787759034] [2020-08-19 06:49:11,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,688 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-19 06:49:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,708 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-19 06:49:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 06:49:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,710 INFO L225 Difference]: With dead ends: 63 [2020-08-19 06:49:11,710 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 06:49:11,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 06:49:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-19 06:49:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 06:49:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-19 06:49:11,720 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-19 06:49:11,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,720 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-19 06:49:11,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-19 06:49:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 06:49:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:49:11,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-19 06:49:11,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759285389] [2020-08-19 06:49:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759285389] [2020-08-19 06:49:11,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750328634] [2020-08-19 06:49:11,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,781 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-19 06:49:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,804 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-19 06:49:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 06:49:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,807 INFO L225 Difference]: With dead ends: 76 [2020-08-19 06:49:11,807 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 06:49:11,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 06:49:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-19 06:49:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 06:49:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-19 06:49:11,818 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-19 06:49:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,818 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-19 06:49:11,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-19 06:49:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 06:49:11,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:49:11,820 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-19 06:49:11,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391569762] [2020-08-19 06:49:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391569762] [2020-08-19 06:49:11,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370086517] [2020-08-19 06:49:11,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,867 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-19 06:49:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,893 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-19 06:49:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 06:49:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,895 INFO L225 Difference]: With dead ends: 124 [2020-08-19 06:49:11,896 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 06:49:11,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 06:49:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-19 06:49:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 06:49:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-19 06:49:11,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-19 06:49:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,907 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-19 06:49:11,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-19 06:49:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:49:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:49:11,909 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-19 06:49:11,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815019167] [2020-08-19 06:49:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:11,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815019167] [2020-08-19 06:49:11,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:11,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:11,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281098541] [2020-08-19 06:49:11,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:11,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,943 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-19 06:49:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:11,960 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-19 06:49:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:11,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 06:49:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:11,962 INFO L225 Difference]: With dead ends: 111 [2020-08-19 06:49:11,963 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 06:49:11,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 06:49:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 06:49:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 06:49:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-19 06:49:11,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-19 06:49:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:11,973 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-19 06:49:11,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-19 06:49:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:49:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:11,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:11,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:49:11,975 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-19 06:49:11,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:11,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564771366] [2020-08-19 06:49:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564771366] [2020-08-19 06:49:12,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018480205] [2020-08-19 06:49:12,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,031 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-19 06:49:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,048 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-19 06:49:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 06:49:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,050 INFO L225 Difference]: With dead ends: 132 [2020-08-19 06:49:12,050 INFO L226 Difference]: Without dead ends: 130 [2020-08-19 06:49:12,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-19 06:49:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-19 06:49:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 06:49:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-19 06:49:12,064 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-19 06:49:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,064 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-19 06:49:12,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-19 06:49:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 06:49:12,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:49:12,067 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-19 06:49:12,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931094906] [2020-08-19 06:49:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931094906] [2020-08-19 06:49:12,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638928721] [2020-08-19 06:49:12,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,107 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-19 06:49:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,130 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-19 06:49:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 06:49:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,132 INFO L225 Difference]: With dead ends: 232 [2020-08-19 06:49:12,132 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 06:49:12,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 06:49:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 06:49:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 06:49:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-19 06:49:12,148 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-19 06:49:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,149 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-19 06:49:12,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-19 06:49:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:49:12,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:49:12,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-19 06:49:12,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150090469] [2020-08-19 06:49:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150090469] [2020-08-19 06:49:12,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548894196] [2020-08-19 06:49:12,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,199 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-19 06:49:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,220 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-19 06:49:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:49:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,222 INFO L225 Difference]: With dead ends: 204 [2020-08-19 06:49:12,222 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 06:49:12,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 06:49:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-19 06:49:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:49:12,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-19 06:49:12,236 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-19 06:49:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,237 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-19 06:49:12,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-19 06:49:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:49:12,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:49:12,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-19 06:49:12,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183826967] [2020-08-19 06:49:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183826967] [2020-08-19 06:49:12,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144643769] [2020-08-19 06:49:12,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,279 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-19 06:49:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,301 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-19 06:49:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:49:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,303 INFO L225 Difference]: With dead ends: 236 [2020-08-19 06:49:12,303 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 06:49:12,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 06:49:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-19 06:49:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 06:49:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-19 06:49:12,326 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-19 06:49:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,327 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-19 06:49:12,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-19 06:49:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 06:49:12,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:49:12,329 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-19 06:49:12,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818772798] [2020-08-19 06:49:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818772798] [2020-08-19 06:49:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947246418] [2020-08-19 06:49:12,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,359 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-19 06:49:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,381 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-19 06:49:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 06:49:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,384 INFO L225 Difference]: With dead ends: 444 [2020-08-19 06:49:12,384 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 06:49:12,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 06:49:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 06:49:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 06:49:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-19 06:49:12,399 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-19 06:49:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,399 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-19 06:49:12,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-19 06:49:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:12,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:49:12,402 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-19 06:49:12,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684296270] [2020-08-19 06:49:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684296270] [2020-08-19 06:49:12,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317732736] [2020-08-19 06:49:12,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,432 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-19 06:49:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,457 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-19 06:49:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,459 INFO L225 Difference]: With dead ends: 384 [2020-08-19 06:49:12,459 INFO L226 Difference]: Without dead ends: 266 [2020-08-19 06:49:12,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-19 06:49:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-19 06:49:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 06:49:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-19 06:49:12,473 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-19 06:49:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,473 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-19 06:49:12,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-19 06:49:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:12,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:49:12,476 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-19 06:49:12,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548973624] [2020-08-19 06:49:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548973624] [2020-08-19 06:49:12,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243988530] [2020-08-19 06:49:12,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,499 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-19 06:49:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,521 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-19 06:49:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,524 INFO L225 Difference]: With dead ends: 426 [2020-08-19 06:49:12,524 INFO L226 Difference]: Without dead ends: 424 [2020-08-19 06:49:12,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-19 06:49:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-19 06:49:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 06:49:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-19 06:49:12,540 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-19 06:49:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,540 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-19 06:49:12,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-19 06:49:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 06:49:12,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:49:12,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:49:12,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:49:12,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:49:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:49:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-19 06:49:12,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:49:12,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314216838] [2020-08-19 06:49:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:49:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:49:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:49:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:49:12,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314216838] [2020-08-19 06:49:12,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:49:12,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:49:12,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747729456] [2020-08-19 06:49:12,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:49:12,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:49:12,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:49:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,586 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-19 06:49:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:49:12,618 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-19 06:49:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:49:12,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 06:49:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:49:12,619 INFO L225 Difference]: With dead ends: 856 [2020-08-19 06:49:12,619 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:49:12,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:49:12,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:49:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:49:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:49:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:49:12,624 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-19 06:49:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:49:12,624 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:49:12,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:49:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:49:12,625 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:49:12,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:49:12,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:49:12,673 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 06:49:12,674 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:12,674 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:49:12,674 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:49:12,674 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-19 06:49:12,675 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-19 06:49:12,675 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,676 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,677 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-19 06:49:12,677 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-19 06:49:12,678 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-19 06:49:12,678 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-19 06:49:12,679 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 06:49:12,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:49:12 BoogieIcfgContainer [2020-08-19 06:49:12,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:49:12,701 INFO L168 Benchmark]: Toolchain (without parser) took 2369.27 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 102.0 MB in the beginning and 146.0 MB in the end (delta: -44.0 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,702 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.74 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,706 INFO L168 Benchmark]: Boogie Preprocessor took 101.38 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 181.7 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,715 INFO L168 Benchmark]: RCFGBuilder took 291.53 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 166.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,718 INFO L168 Benchmark]: TraceAbstraction took 1685.18 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 165.4 MB in the beginning and 146.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:49:12,721 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.74 ms. Allocated memory is still 140.0 MB. Free memory was 101.6 MB in the beginning and 91.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.38 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.7 MB in the beginning and 181.7 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.53 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 166.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1685.18 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 165.4 MB in the beginning and 146.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, 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, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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...