/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:09:14,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:09:14,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:09:14,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:09:14,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:09:14,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:09:14,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:09:14,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:09:14,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:09:14,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:09:14,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:09:14,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:09:14,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:09:14,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:09:14,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:09:14,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:09:14,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:09:14,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:09:14,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:09:14,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:09:14,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:09:14,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:09:14,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:09:14,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:09:14,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:09:14,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:09:14,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:09:14,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:09:14,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:09:14,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:09:14,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:09:14,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:09:14,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:09:14,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:09:14,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:09:14,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:09:14,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:09:14,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:09:14,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:09:14,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:09:14,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:09:14,786 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 01:09:14,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:09:14,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:09:14,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:09:14,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:09:14,828 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:09:14,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:09:14,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:09:14,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:09:14,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:09:14,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:09:14,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:09:14,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:09:14,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:09:14,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:09:14,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:09:14,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:09:14,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:09:14,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:09:14,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:09:14,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:09:14,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:09:14,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:09:14,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:09:14,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:09:14,835 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=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:09:15,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:09:15,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:09:15,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:09:15,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:09:15,191 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:09:15,192 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 01:09:15,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d1ab056/ccc26985529b4db7955247c141c07cb3/FLAGc83e6cd87 [2020-08-19 01:09:15,682 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:09:15,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 01:09:15,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d1ab056/ccc26985529b4db7955247c141c07cb3/FLAGc83e6cd87 [2020-08-19 01:09:16,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d1ab056/ccc26985529b4db7955247c141c07cb3 [2020-08-19 01:09:16,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:09:16,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:09:16,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:09:16,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:09:16,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:09:16,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16, skipping insertion in model container [2020-08-19 01:09:16,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:09:16,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:09:16,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:09:16,322 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:09:16,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:09:16,411 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:09:16,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16 WrapperNode [2020-08-19 01:09:16,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:09:16,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:09:16,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:09:16,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:09:16,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (1/1) ... [2020-08-19 01:09:16,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:09:16,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:09:16,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:09:16,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:09:16,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (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 01:09:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:09:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:09:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:09:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:09:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:09:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:09:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:09:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:09:16,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:09:16,975 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:09:16,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:09:16 BoogieIcfgContainer [2020-08-19 01:09:16,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:09:16,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:09:16,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:09:16,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:09:16,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:09:16" (1/3) ... [2020-08-19 01:09:16,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71eeb81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:09:16, skipping insertion in model container [2020-08-19 01:09:16,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:09:16" (2/3) ... [2020-08-19 01:09:16,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71eeb81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:09:16, skipping insertion in model container [2020-08-19 01:09:16,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:09:16" (3/3) ... [2020-08-19 01:09:16,991 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-19 01:09:17,003 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:09:17,013 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:09:17,031 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:09:17,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:09:17,061 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:09:17,061 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:09:17,061 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:09:17,061 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:09:17,061 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:09:17,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:09:17,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:09:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-19 01:09:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:09:17,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:17,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:17,092 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-19 01:09:17,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:17,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845300341] [2020-08-19 01:09:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,348 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 01:09:17,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845300341] [2020-08-19 01:09:17,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:17,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009551733] [2020-08-19 01:09:17,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:17,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:17,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:17,373 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-19 01:09:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:17,458 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-19 01:09:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:17,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:09:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:17,474 INFO L225 Difference]: With dead ends: 87 [2020-08-19 01:09:17,475 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 01:09:17,483 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 01:09:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 01:09:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-19 01:09:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 01:09:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-19 01:09:17,551 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-19 01:09:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:17,552 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-19 01:09:17,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-19 01:09:17,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:09:17,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:17,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:17,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:09:17,560 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:17,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-19 01:09:17,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:17,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119557712] [2020-08-19 01:09:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,694 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 01:09:17,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119557712] [2020-08-19 01:09:17,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:17,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:17,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183826967] [2020-08-19 01:09:17,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:17,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:17,701 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-19 01:09:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:17,760 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-19 01:09:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:17,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 01:09:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:17,763 INFO L225 Difference]: With dead ends: 117 [2020-08-19 01:09:17,763 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 01:09:17,767 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 01:09:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 01:09:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-19 01:09:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 01:09:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-19 01:09:17,788 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-19 01:09:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:17,790 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-19 01:09:17,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-19 01:09:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:17,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:17,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:17,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:09:17,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-19 01:09:17,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:17,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560130667] [2020-08-19 01:09:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,841 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 01:09:17,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560130667] [2020-08-19 01:09:17,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:17,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:17,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38101928] [2020-08-19 01:09:17,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:17,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:17,844 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-19 01:09:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:17,879 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-19 01:09:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:17,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:17,883 INFO L225 Difference]: With dead ends: 108 [2020-08-19 01:09:17,883 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 01:09:17,884 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 01:09:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 01:09:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-19 01:09:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 01:09:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-19 01:09:17,893 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-19 01:09:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:17,894 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-19 01:09:17,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-19 01:09:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:17,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:17,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:09:17,896 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-19 01:09:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:17,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228018613] [2020-08-19 01:09:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:17,941 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 01:09:17,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228018613] [2020-08-19 01:09:17,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:17,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:17,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373029838] [2020-08-19 01:09:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:17,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:17,944 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-19 01:09:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:17,963 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-19 01:09:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:17,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:17,965 INFO L225 Difference]: With dead ends: 136 [2020-08-19 01:09:17,965 INFO L226 Difference]: Without dead ends: 134 [2020-08-19 01:09:17,966 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 01:09:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-19 01:09:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-19 01:09:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 01:09:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-19 01:09:17,979 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-19 01:09:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:17,979 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-19 01:09:17,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-19 01:09:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:09:17,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:17,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:17,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:09:17,982 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-19 01:09:17,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:17,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235908702] [2020-08-19 01:09:17,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,035 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 01:09:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235908702] [2020-08-19 01:09:18,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911453051] [2020-08-19 01:09:18,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,042 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-19 01:09:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,083 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-19 01:09:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:09:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,087 INFO L225 Difference]: With dead ends: 224 [2020-08-19 01:09:18,090 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 01:09:18,091 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 01:09:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 01:09:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-19 01:09:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-19 01:09:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-19 01:09:18,113 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-19 01:09:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,115 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-19 01:09:18,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-19 01:09:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:18,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:09:18,121 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-19 01:09:18,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588211304] [2020-08-19 01:09:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,189 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 01:09:18,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588211304] [2020-08-19 01:09:18,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290514649] [2020-08-19 01:09:18,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,192 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-19 01:09:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,209 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-19 01:09:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,212 INFO L225 Difference]: With dead ends: 201 [2020-08-19 01:09:18,212 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 01:09:18,213 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 01:09:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 01:09:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 01:09:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 01:09:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-19 01:09:18,228 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-19 01:09:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,229 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-19 01:09:18,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-19 01:09:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:18,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:09:18,245 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-19 01:09:18,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624176329] [2020-08-19 01:09:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,286 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 01:09:18,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624176329] [2020-08-19 01:09:18,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639716167] [2020-08-19 01:09:18,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,289 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-19 01:09:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,306 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-19 01:09:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,308 INFO L225 Difference]: With dead ends: 252 [2020-08-19 01:09:18,308 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 01:09:18,309 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 01:09:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 01:09:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-19 01:09:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 01:09:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-19 01:09:18,322 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-19 01:09:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,322 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-19 01:09:18,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-19 01:09:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:09:18,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:09:18,325 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,325 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-19 01:09:18,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56941161] [2020-08-19 01:09:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,364 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 01:09:18,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56941161] [2020-08-19 01:09:18,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045250440] [2020-08-19 01:09:18,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,366 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-19 01:09:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,386 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-19 01:09:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:09:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,389 INFO L225 Difference]: With dead ends: 432 [2020-08-19 01:09:18,389 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 01:09:18,391 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 01:09:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 01:09:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 01:09:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 01:09:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-19 01:09:18,405 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-19 01:09:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,405 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-19 01:09:18,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,406 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-19 01:09:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:18,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:09:18,408 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-19 01:09:18,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282482221] [2020-08-19 01:09:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,432 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 01:09:18,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282482221] [2020-08-19 01:09:18,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057888761] [2020-08-19 01:09:18,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,434 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-19 01:09:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,453 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-19 01:09:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,455 INFO L225 Difference]: With dead ends: 384 [2020-08-19 01:09:18,456 INFO L226 Difference]: Without dead ends: 262 [2020-08-19 01:09:18,457 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 01:09:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-19 01:09:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-19 01:09:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-19 01:09:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-19 01:09:18,469 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-19 01:09:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,469 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-19 01:09:18,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-19 01:09:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:18,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:09:18,472 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-19 01:09:18,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844114305] [2020-08-19 01:09:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,516 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 01:09:18,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844114305] [2020-08-19 01:09:18,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234117266] [2020-08-19 01:09:18,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,519 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-19 01:09:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,539 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-19 01:09:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,542 INFO L225 Difference]: With dead ends: 476 [2020-08-19 01:09:18,542 INFO L226 Difference]: Without dead ends: 474 [2020-08-19 01:09:18,543 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 01:09:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-19 01:09:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-19 01:09:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 01:09:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-19 01:09:18,563 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-19 01:09:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,563 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-19 01:09:18,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-19 01:09:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:09:18,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:09:18,570 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-19 01:09:18,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668106753] [2020-08-19 01:09:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,614 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 01:09:18,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668106753] [2020-08-19 01:09:18,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284402762] [2020-08-19 01:09:18,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,617 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-19 01:09:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,660 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-19 01:09:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:09:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,664 INFO L225 Difference]: With dead ends: 844 [2020-08-19 01:09:18,665 INFO L226 Difference]: Without dead ends: 498 [2020-08-19 01:09:18,666 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 01:09:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-19 01:09:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-19 01:09:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-19 01:09:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-19 01:09:18,696 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-19 01:09:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,697 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-19 01:09:18,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,697 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-19 01:09:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:18,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:09:18,703 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-19 01:09:18,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306691461] [2020-08-19 01:09:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,752 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 01:09:18,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306691461] [2020-08-19 01:09:18,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476658737] [2020-08-19 01:09:18,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,757 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-19 01:09:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,785 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-19 01:09:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,789 INFO L225 Difference]: With dead ends: 744 [2020-08-19 01:09:18,789 INFO L226 Difference]: Without dead ends: 506 [2020-08-19 01:09:18,791 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 01:09:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-19 01:09:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-19 01:09:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-19 01:09:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-19 01:09:18,808 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-19 01:09:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,809 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-19 01:09:18,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-19 01:09:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:18,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:09:18,812 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-19 01:09:18,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425194628] [2020-08-19 01:09:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,842 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 01:09:18,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425194628] [2020-08-19 01:09:18,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994032089] [2020-08-19 01:09:18,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,851 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-19 01:09:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:18,882 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-19 01:09:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:18,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:18,889 INFO L225 Difference]: With dead ends: 908 [2020-08-19 01:09:18,889 INFO L226 Difference]: Without dead ends: 906 [2020-08-19 01:09:18,890 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 01:09:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-19 01:09:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-19 01:09:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-19 01:09:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-19 01:09:18,913 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-19 01:09:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:18,915 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-19 01:09:18,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-19 01:09:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:09:18,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:18,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:18,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:09:18,918 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:18,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-19 01:09:18,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:18,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967725469] [2020-08-19 01:09:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:18,959 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 01:09:18,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967725469] [2020-08-19 01:09:18,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:18,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:18,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780970680] [2020-08-19 01:09:18,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:18,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:18,962 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-19 01:09:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,000 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-19 01:09:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:09:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,007 INFO L225 Difference]: With dead ends: 1660 [2020-08-19 01:09:19,008 INFO L226 Difference]: Without dead ends: 970 [2020-08-19 01:09:19,011 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 01:09:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-19 01:09:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-19 01:09:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-19 01:09:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-19 01:09:19,047 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-19 01:09:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,048 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-19 01:09:19,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-19 01:09:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:19,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:09:19,051 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-19 01:09:19,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734318940] [2020-08-19 01:09:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,082 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 01:09:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734318940] [2020-08-19 01:09:19,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837996579] [2020-08-19 01:09:19,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,085 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-19 01:09:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,126 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-19 01:09:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,132 INFO L225 Difference]: With dead ends: 1452 [2020-08-19 01:09:19,132 INFO L226 Difference]: Without dead ends: 986 [2020-08-19 01:09:19,135 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 01:09:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-19 01:09:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-19 01:09:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-19 01:09:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-19 01:09:19,164 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-19 01:09:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,166 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-19 01:09:19,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-19 01:09:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:19,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:09:19,169 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-19 01:09:19,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054045982] [2020-08-19 01:09:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,206 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 01:09:19,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054045982] [2020-08-19 01:09:19,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477752891] [2020-08-19 01:09:19,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,209 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-19 01:09:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,251 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-19 01:09:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,260 INFO L225 Difference]: With dead ends: 1740 [2020-08-19 01:09:19,260 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 01:09:19,261 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 01:09:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 01:09:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-19 01:09:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-19 01:09:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-19 01:09:19,302 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-19 01:09:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,302 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-19 01:09:19,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-19 01:09:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:09:19,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:09:19,306 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-19 01:09:19,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133174513] [2020-08-19 01:09:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,326 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 01:09:19,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133174513] [2020-08-19 01:09:19,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244665110] [2020-08-19 01:09:19,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,329 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-19 01:09:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,376 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-19 01:09:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:09:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,387 INFO L225 Difference]: With dead ends: 3276 [2020-08-19 01:09:19,387 INFO L226 Difference]: Without dead ends: 1898 [2020-08-19 01:09:19,390 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 01:09:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-19 01:09:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-19 01:09:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-19 01:09:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-19 01:09:19,462 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-19 01:09:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,462 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-19 01:09:19,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-19 01:09:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:19,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 01:09:19,466 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-19 01:09:19,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951842070] [2020-08-19 01:09:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,490 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 01:09:19,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951842070] [2020-08-19 01:09:19,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650476032] [2020-08-19 01:09:19,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,493 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-19 01:09:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,550 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-19 01:09:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,564 INFO L225 Difference]: With dead ends: 2844 [2020-08-19 01:09:19,565 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 01:09:19,569 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 01:09:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 01:09:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-19 01:09:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-19 01:09:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-19 01:09:19,641 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-19 01:09:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,642 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-19 01:09:19,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-19 01:09:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:19,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 01:09:19,647 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-19 01:09:19,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840461075] [2020-08-19 01:09:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,674 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 01:09:19,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840461075] [2020-08-19 01:09:19,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890408293] [2020-08-19 01:09:19,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,677 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-19 01:09:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,765 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-19 01:09:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,785 INFO L225 Difference]: With dead ends: 3340 [2020-08-19 01:09:19,786 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 01:09:19,787 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 01:09:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 01:09:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-19 01:09:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-19 01:09:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-19 01:09:19,876 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-19 01:09:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:19,876 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-19 01:09:19,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-19 01:09:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:09:19,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:19,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:19,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 01:09:19,883 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-19 01:09:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:19,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268655955] [2020-08-19 01:09:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:19,903 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 01:09:19,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268655955] [2020-08-19 01:09:19,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:19,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:19,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611322498] [2020-08-19 01:09:19,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:19,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:19,905 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-19 01:09:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:19,972 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-19 01:09:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:19,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:09:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:19,991 INFO L225 Difference]: With dead ends: 6476 [2020-08-19 01:09:19,991 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 01:09:19,997 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 01:09:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 01:09:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-19 01:09:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-19 01:09:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-19 01:09:20,101 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-19 01:09:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:20,102 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-19 01:09:20,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-19 01:09:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:09:20,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:20,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:20,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 01:09:20,108 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:20,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-19 01:09:20,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:20,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398491645] [2020-08-19 01:09:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,126 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 01:09:20,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398491645] [2020-08-19 01:09:20,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:20,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:20,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711732463] [2020-08-19 01:09:20,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:20,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:20,129 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-19 01:09:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:20,212 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-19 01:09:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:20,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:09:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:20,230 INFO L225 Difference]: With dead ends: 5580 [2020-08-19 01:09:20,230 INFO L226 Difference]: Without dead ends: 3786 [2020-08-19 01:09:20,233 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 01:09:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-19 01:09:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-19 01:09:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-19 01:09:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-19 01:09:20,350 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-19 01:09:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:20,351 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-19 01:09:20,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-19 01:09:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:09:20,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:20,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:20,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 01:09:20,357 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-19 01:09:20,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:20,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003911878] [2020-08-19 01:09:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,392 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 01:09:20,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003911878] [2020-08-19 01:09:20,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:20,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:20,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780417535] [2020-08-19 01:09:20,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:20,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:20,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:20,395 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-19 01:09:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:20,501 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-19 01:09:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:20,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:09:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:20,543 INFO L225 Difference]: With dead ends: 10956 [2020-08-19 01:09:20,543 INFO L226 Difference]: Without dead ends: 7306 [2020-08-19 01:09:20,553 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 01:09:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-19 01:09:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-19 01:09:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 01:09:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-19 01:09:20,825 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-19 01:09:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:20,826 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-19 01:09:20,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-19 01:09:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:09:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:20,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:20,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 01:09:20,835 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-19 01:09:20,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:20,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511529424] [2020-08-19 01:09:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:20,859 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 01:09:20,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511529424] [2020-08-19 01:09:20,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:20,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:20,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430784957] [2020-08-19 01:09:20,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:20,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:20,861 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-19 01:09:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:21,003 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-19 01:09:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:21,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:09:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:21,026 INFO L225 Difference]: With dead ends: 8076 [2020-08-19 01:09:21,026 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 01:09:21,030 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 01:09:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 01:09:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-19 01:09:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 01:09:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-19 01:09:21,231 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-19 01:09:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:21,232 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-19 01:09:21,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-19 01:09:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:09:21,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:21,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:21,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 01:09:21,243 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-19 01:09:21,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:21,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156208810] [2020-08-19 01:09:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:21,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:21,284 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 01:09:21,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156208810] [2020-08-19 01:09:21,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:21,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:21,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809172569] [2020-08-19 01:09:21,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:21,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:21,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:21,286 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-19 01:09:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:21,512 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-19 01:09:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:21,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 01:09:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:21,536 INFO L225 Difference]: With dead ends: 12172 [2020-08-19 01:09:21,536 INFO L226 Difference]: Without dead ends: 12170 [2020-08-19 01:09:21,539 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 01:09:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-19 01:09:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-19 01:09:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-19 01:09:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-19 01:09:21,752 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-19 01:09:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:21,753 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-19 01:09:21,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-19 01:09:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:09:21,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:21,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:21,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 01:09:21,770 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-19 01:09:21,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:21,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657041602] [2020-08-19 01:09:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:21,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:21,788 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 01:09:21,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657041602] [2020-08-19 01:09:21,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:21,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:21,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593934008] [2020-08-19 01:09:21,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:21,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:21,790 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-19 01:09:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:22,070 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-19 01:09:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:22,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 01:09:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:22,096 INFO L225 Difference]: With dead ends: 25228 [2020-08-19 01:09:22,097 INFO L226 Difference]: Without dead ends: 14218 [2020-08-19 01:09:22,117 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 01:09:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-19 01:09:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-19 01:09:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-19 01:09:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-19 01:09:22,689 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-19 01:09:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:22,689 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-19 01:09:22,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-19 01:09:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 01:09:22,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:22,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:22,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 01:09:22,719 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-19 01:09:22,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:22,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469659991] [2020-08-19 01:09:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:22,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:22,768 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 01:09:22,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469659991] [2020-08-19 01:09:22,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:22,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:22,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293346325] [2020-08-19 01:09:22,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:22,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:22,772 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-19 01:09:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:23,051 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-19 01:09:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:23,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 01:09:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:23,095 INFO L225 Difference]: With dead ends: 21516 [2020-08-19 01:09:23,095 INFO L226 Difference]: Without dead ends: 14602 [2020-08-19 01:09:23,118 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 01:09:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-19 01:09:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-19 01:09:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-19 01:09:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-19 01:09:24,350 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-19 01:09:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:24,350 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-19 01:09:24,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-19 01:09:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 01:09:24,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:24,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:24,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 01:09:24,374 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:24,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:24,375 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-19 01:09:24,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:24,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160328898] [2020-08-19 01:09:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:24,399 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 01:09:24,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160328898] [2020-08-19 01:09:24,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:24,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:24,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056872927] [2020-08-19 01:09:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:24,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:24,401 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-19 01:09:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:24,678 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-19 01:09:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:24,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 01:09:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:24,723 INFO L225 Difference]: With dead ends: 23562 [2020-08-19 01:09:24,724 INFO L226 Difference]: Without dead ends: 23560 [2020-08-19 01:09:24,733 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 01:09:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-19 01:09:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-19 01:09:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-19 01:09:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-19 01:09:25,212 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-19 01:09:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:25,212 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-19 01:09:25,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-19 01:09:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 01:09:25,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:09:25,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:09:25,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 01:09:25,251 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:09:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:09:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-19 01:09:25,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:09:25,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205659847] [2020-08-19 01:09:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:09:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:25,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:09:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:09:25,280 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 01:09:25,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205659847] [2020-08-19 01:09:25,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:09:25,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:09:25,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180510690] [2020-08-19 01:09:25,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:09:25,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:09:25,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:09:25,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:09:25,283 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-19 01:09:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:09:25,626 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-19 01:09:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:09:25,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 01:09:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:09:25,627 INFO L225 Difference]: With dead ends: 50184 [2020-08-19 01:09:25,627 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:09:25,693 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 01:09:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:09:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:09:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:09:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:09:25,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-19 01:09:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:09:25,694 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:09:25,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:09:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:09:25,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:09:25,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 01:09:25,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:09:25,726 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:09:25,726 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:09:25,726 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:09:25,727 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,727 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,728 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-19 01:09:25,728 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-19 01:09:25,729 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-19 01:09:25,729 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-19 01:09:25,729 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-19 01:09:25,729 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-19 01:09:25,729 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-19 01:09:25,729 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,729 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 01:09:25,730 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-19 01:09:25,731 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-19 01:09:25,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:09:25 BoogieIcfgContainer [2020-08-19 01:09:25,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:09:25,746 INFO L168 Benchmark]: Toolchain (without parser) took 9689.68 ms. Allocated memory was 146.3 MB in the beginning and 595.1 MB in the end (delta: 448.8 MB). Free memory was 101.9 MB in the beginning and 189.7 MB in the end (delta: -87.8 MB). Peak memory consumption was 361.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,747 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.91 ms. Allocated memory is still 146.3 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,748 INFO L168 Benchmark]: Boogie Preprocessor took 177.58 ms. Allocated memory was 146.3 MB in the beginning and 205.5 MB in the end (delta: 59.2 MB). Free memory was 90.9 MB in the beginning and 182.6 MB in the end (delta: -91.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,749 INFO L168 Benchmark]: RCFGBuilder took 388.90 ms. Allocated memory is still 205.5 MB. Free memory was 182.6 MB in the beginning and 163.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,749 INFO L168 Benchmark]: TraceAbstraction took 8761.20 ms. Allocated memory was 205.5 MB in the beginning and 595.1 MB in the end (delta: 389.5 MB). Free memory was 162.8 MB in the beginning and 189.7 MB in the end (delta: -26.9 MB). Peak memory consumption was 362.6 MB. Max. memory is 7.1 GB. [2020-08-19 01:09:25,752 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.91 ms. Allocated memory is still 146.3 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 177.58 ms. Allocated memory was 146.3 MB in the beginning and 205.5 MB in the end (delta: 59.2 MB). Free memory was 90.9 MB in the beginning and 182.6 MB in the end (delta: -91.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 388.90 ms. Allocated memory is still 205.5 MB. Free memory was 182.6 MB in the beginning and 163.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8761.20 ms. Allocated memory was 205.5 MB in the beginning and 595.1 MB in the end (delta: 389.5 MB). Free memory was 162.8 MB in the beginning and 189.7 MB in the end (delta: -26.9 MB). Peak memory consumption was 362.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.6s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...