/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=NARROWEST -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 [2020-08-18 21:55:18,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:18,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:18,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:55:18,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:55:18,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:55:18,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:55:18,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:55:18,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:55:18,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:55:18,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:55:18,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:55:18,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:18,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:18,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:18,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:18,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:18,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:18,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:18,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:18,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:18,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:18,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:18,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:18,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:55:18,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:18,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:18,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:18,229 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 [2020-08-18 21:55:18,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:18,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:18,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:18,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:18,271 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:18,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:18,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:18,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:18,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:18,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:18,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:18,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:18,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:18,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:18,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:18,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:18,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:18,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:18,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:18,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:18,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:18,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:18,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:18,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:18,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:18,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:18,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:18,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:18,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:18,277 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:18,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:18,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:18,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:18,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:18,615 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:18,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 21:55:18,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba9c42ab/a05a06cd83154616a9dcb274f3c7ca42/FLAGf2814a8f9 [2020-08-18 21:55:19,146 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:19,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 21:55:19,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba9c42ab/a05a06cd83154616a9dcb274f3c7ca42/FLAGf2814a8f9 [2020-08-18 21:55:19,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ba9c42ab/a05a06cd83154616a9dcb274f3c7ca42 [2020-08-18 21:55:19,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:19,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:19,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:19,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:19,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:19,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19, skipping insertion in model container [2020-08-18 21:55:19,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:19,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:19,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:19,767 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:19,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:19,810 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:19,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19 WrapperNode [2020-08-18 21:55:19,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:19,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:19,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:19,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:19,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (1/1) ... [2020-08-18 21:55:19,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:19,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:19,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:19,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:19,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (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 [2020-08-18 21:55:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:20,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:20,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:20,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:20,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:20,330 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:55:20,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:20 BoogieIcfgContainer [2020-08-18 21:55:20,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:20,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:20,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:20,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:20,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:19" (1/3) ... [2020-08-18 21:55:20,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d72e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:20, skipping insertion in model container [2020-08-18 21:55:20,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:19" (2/3) ... [2020-08-18 21:55:20,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d72e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:20, skipping insertion in model container [2020-08-18 21:55:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:20" (3/3) ... [2020-08-18 21:55:20,345 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 21:55:20,359 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:20,368 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:20,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:20,415 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:20,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:20,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:20,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:20,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:20,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:20,416 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:20,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 21:55:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:20,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:20,453 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] [2020-08-18 21:55:20,453 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 21:55:20,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:20,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475346468] [2020-08-18 21:55:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:20,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:20,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475346468] [2020-08-18 21:55:20,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:20,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:20,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597661227] [2020-08-18 21:55:20,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:20,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:20,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:20,703 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 21:55:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:20,800 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 21:55:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:20,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:20,817 INFO L225 Difference]: With dead ends: 87 [2020-08-18 21:55:20,818 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:55:20,822 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 [2020-08-18 21:55:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:55:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 21:55:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 21:55:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 21:55:20,873 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 21:55:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:20,873 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 21:55:20,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 21:55:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:55:20,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:20,875 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] [2020-08-18 21:55:20,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:20,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 21:55:20,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:20,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450626769] [2020-08-18 21:55:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:20,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:20,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450626769] [2020-08-18 21:55:20,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:20,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:20,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383164376] [2020-08-18 21:55:20,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:20,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:20,958 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 21:55:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:20,986 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 21:55:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:20,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:55:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:20,989 INFO L225 Difference]: With dead ends: 117 [2020-08-18 21:55:20,989 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 21:55:20,991 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 [2020-08-18 21:55:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 21:55:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 21:55:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 21:55:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 21:55:21,004 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 21:55:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,004 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 21:55:21,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 21:55:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:21,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,006 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] [2020-08-18 21:55:21,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:21,007 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 21:55:21,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810320880] [2020-08-18 21:55:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810320880] [2020-08-18 21:55:21,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097607916] [2020-08-18 21:55:21,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,109 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 21:55:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,135 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 21:55:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,138 INFO L225 Difference]: With dead ends: 108 [2020-08-18 21:55:21,138 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 21:55:21,139 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 [2020-08-18 21:55:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 21:55:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 21:55:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 21:55:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 21:55:21,150 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 21:55:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,151 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 21:55:21,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 21:55:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:21,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,152 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] [2020-08-18 21:55:21,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:21,153 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 21:55:21,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245535184] [2020-08-18 21:55:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245535184] [2020-08-18 21:55:21,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139987702] [2020-08-18 21:55:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,215 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 21:55:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,249 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 21:55:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,252 INFO L225 Difference]: With dead ends: 136 [2020-08-18 21:55:21,252 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 21:55:21,252 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 [2020-08-18 21:55:21,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 21:55:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 21:55:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 21:55:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 21:55:21,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 21:55:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,266 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 21:55:21,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 21:55:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:55:21,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,268 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] [2020-08-18 21:55:21,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:21,269 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 21:55:21,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245022108] [2020-08-18 21:55:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245022108] [2020-08-18 21:55:21,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577466847] [2020-08-18 21:55:21,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,314 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 21:55:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,338 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 21:55:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:55:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,340 INFO L225 Difference]: With dead ends: 224 [2020-08-18 21:55:21,341 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 21:55:21,342 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 [2020-08-18 21:55:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 21:55:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 21:55:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 21:55:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 21:55:21,356 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 21:55:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,357 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 21:55:21,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 21:55:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:21,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,359 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] [2020-08-18 21:55:21,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:21,359 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 21:55:21,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126341580] [2020-08-18 21:55:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126341580] [2020-08-18 21:55:21,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510565021] [2020-08-18 21:55:21,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,427 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 21:55:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,458 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 21:55:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,460 INFO L225 Difference]: With dead ends: 201 [2020-08-18 21:55:21,460 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 21:55:21,461 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 [2020-08-18 21:55:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 21:55:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 21:55:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 21:55:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 21:55:21,473 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 21:55:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,473 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 21:55:21,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 21:55:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:21,474 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:21,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:21,475 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 21:55:21,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315482804] [2020-08-18 21:55:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315482804] [2020-08-18 21:55:21,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740409156] [2020-08-18 21:55:21,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,506 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 21:55:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,527 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 21:55:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,530 INFO L225 Difference]: With dead ends: 252 [2020-08-18 21:55:21,530 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 21:55:21,530 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 [2020-08-18 21:55:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 21:55:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 21:55:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 21:55:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 21:55:21,544 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 21:55:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,544 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 21:55:21,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 21:55:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:55:21,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,546 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] [2020-08-18 21:55:21,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:55:21,546 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 21:55:21,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447178919] [2020-08-18 21:55:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447178919] [2020-08-18 21:55:21,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450751352] [2020-08-18 21:55:21,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,578 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 21:55:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,597 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 21:55:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:55:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,600 INFO L225 Difference]: With dead ends: 432 [2020-08-18 21:55:21,600 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 21:55:21,601 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 [2020-08-18 21:55:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 21:55:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 21:55:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 21:55:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 21:55:21,618 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 21:55:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,618 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 21:55:21,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 21:55:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:21,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,620 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] [2020-08-18 21:55:21,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:55:21,621 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 21:55:21,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005777005] [2020-08-18 21:55:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005777005] [2020-08-18 21:55:21,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428948498] [2020-08-18 21:55:21,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,650 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 21:55:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,669 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 21:55:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,672 INFO L225 Difference]: With dead ends: 384 [2020-08-18 21:55:21,672 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 21:55:21,673 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 [2020-08-18 21:55:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 21:55:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 21:55:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 21:55:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 21:55:21,685 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 21:55:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,685 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 21:55:21,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 21:55:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:21,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,687 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] [2020-08-18 21:55:21,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:55:21,688 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 21:55:21,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852339983] [2020-08-18 21:55:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852339983] [2020-08-18 21:55:21,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070358578] [2020-08-18 21:55:21,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,727 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 21:55:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,747 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 21:55:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,751 INFO L225 Difference]: With dead ends: 476 [2020-08-18 21:55:21,751 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 21:55:21,751 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 [2020-08-18 21:55:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 21:55:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 21:55:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 21:55:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 21:55:21,765 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 21:55:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,766 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 21:55:21,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 21:55:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:55:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,768 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] [2020-08-18 21:55:21,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:55:21,768 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 21:55:21,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68065195] [2020-08-18 21:55:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68065195] [2020-08-18 21:55:21,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651622335] [2020-08-18 21:55:21,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,797 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 21:55:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,840 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 21:55:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:55:21,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,845 INFO L225 Difference]: With dead ends: 844 [2020-08-18 21:55:21,845 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 21:55:21,847 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 [2020-08-18 21:55:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 21:55:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 21:55:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 21:55:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 21:55:21,872 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 21:55:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,873 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 21:55:21,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 21:55:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:21,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,876 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] [2020-08-18 21:55:21,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:55:21,877 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 21:55:21,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850985509] [2020-08-18 21:55:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850985509] [2020-08-18 21:55:21,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869264610] [2020-08-18 21:55:21,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,917 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 21:55:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:21,948 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 21:55:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:21,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:21,952 INFO L225 Difference]: With dead ends: 744 [2020-08-18 21:55:21,952 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 21:55:21,953 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 [2020-08-18 21:55:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 21:55:21,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 21:55:21,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 21:55:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 21:55:21,969 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 21:55:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:21,969 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 21:55:21,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 21:55:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:21,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:21,971 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] [2020-08-18 21:55:21,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:55:21,971 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 21:55:21,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:21,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331579001] [2020-08-18 21:55:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:21,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331579001] [2020-08-18 21:55:21,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:21,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:21,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593672989] [2020-08-18 21:55:21,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:21,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:21,997 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 21:55:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,024 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 21:55:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,030 INFO L225 Difference]: With dead ends: 908 [2020-08-18 21:55:22,031 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 21:55:22,032 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 [2020-08-18 21:55:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 21:55:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 21:55:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 21:55:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 21:55:22,061 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 21:55:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,062 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 21:55:22,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 21:55:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:55:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,064 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] [2020-08-18 21:55:22,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:55:22,064 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 21:55:22,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241093652] [2020-08-18 21:55:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241093652] [2020-08-18 21:55:22,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187141052] [2020-08-18 21:55:22,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,096 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 21:55:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,129 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 21:55:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:55:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,135 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 21:55:22,136 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 21:55:22,138 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 [2020-08-18 21:55:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 21:55:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 21:55:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 21:55:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 21:55:22,187 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 21:55:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,188 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 21:55:22,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 21:55:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:22,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,189 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] [2020-08-18 21:55:22,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:55:22,189 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 21:55:22,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327807977] [2020-08-18 21:55:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327807977] [2020-08-18 21:55:22,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818817044] [2020-08-18 21:55:22,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,216 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 21:55:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,243 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 21:55:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,249 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 21:55:22,249 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 21:55:22,251 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 [2020-08-18 21:55:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 21:55:22,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 21:55:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 21:55:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 21:55:22,280 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 21:55:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,280 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 21:55:22,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 21:55:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:22,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,283 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] [2020-08-18 21:55:22,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:55:22,283 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 21:55:22,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691185188] [2020-08-18 21:55:22,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691185188] [2020-08-18 21:55:22,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691914573] [2020-08-18 21:55:22,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,309 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 21:55:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,343 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 21:55:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,352 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 21:55:22,352 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 21:55:22,353 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 [2020-08-18 21:55:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 21:55:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 21:55:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 21:55:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 21:55:22,395 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 21:55:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,396 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 21:55:22,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 21:55:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:55:22,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,398 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] [2020-08-18 21:55:22,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:55:22,399 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 21:55:22,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810085906] [2020-08-18 21:55:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810085906] [2020-08-18 21:55:22,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516759842] [2020-08-18 21:55:22,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,422 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 21:55:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,469 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 21:55:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:55:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,479 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 21:55:22,480 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 21:55:22,483 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 [2020-08-18 21:55:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 21:55:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 21:55:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 21:55:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 21:55:22,540 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 21:55:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,540 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 21:55:22,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 21:55:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:22,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,543 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] [2020-08-18 21:55:22,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:55:22,543 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 21:55:22,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935433182] [2020-08-18 21:55:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935433182] [2020-08-18 21:55:22,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740157236] [2020-08-18 21:55:22,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,571 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 21:55:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,618 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 21:55:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,628 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 21:55:22,628 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 21:55:22,630 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 [2020-08-18 21:55:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 21:55:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 21:55:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 21:55:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 21:55:22,704 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 21:55:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,705 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 21:55:22,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 21:55:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,708 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] [2020-08-18 21:55:22,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:55:22,708 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 21:55:22,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292082684] [2020-08-18 21:55:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292082684] [2020-08-18 21:55:22,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873703443] [2020-08-18 21:55:22,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,739 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 21:55:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:22,800 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 21:55:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:22,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:22,815 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 21:55:22,815 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 21:55:22,817 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 [2020-08-18 21:55:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 21:55:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 21:55:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 21:55:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 21:55:22,901 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 21:55:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:22,902 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 21:55:22,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 21:55:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:55:22,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:22,909 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] [2020-08-18 21:55:22,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:55:22,909 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 21:55:22,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:22,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349019334] [2020-08-18 21:55:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:22,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349019334] [2020-08-18 21:55:22,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:22,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:22,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197114866] [2020-08-18 21:55:22,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:22,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:22,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:22,942 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 21:55:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:23,038 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 21:55:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:23,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:55:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:23,062 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 21:55:23,062 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 21:55:23,070 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 [2020-08-18 21:55:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 21:55:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 21:55:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 21:55:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 21:55:23,250 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 21:55:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:23,251 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 21:55:23,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 21:55:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:55:23,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:23,259 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] [2020-08-18 21:55:23,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:55:23,260 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 21:55:23,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:23,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069496992] [2020-08-18 21:55:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069496992] [2020-08-18 21:55:23,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:23,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:23,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345211199] [2020-08-18 21:55:23,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:23,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:23,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:23,286 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 21:55:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:23,366 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 21:55:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:23,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:55:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:23,387 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 21:55:23,387 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 21:55:23,391 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 [2020-08-18 21:55:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 21:55:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 21:55:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 21:55:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 21:55:23,498 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 21:55:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:23,499 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 21:55:23,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 21:55:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:55:23,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:23,504 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] [2020-08-18 21:55:23,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:55:23,504 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 21:55:23,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:23,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192682752] [2020-08-18 21:55:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:23,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192682752] [2020-08-18 21:55:23,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:23,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:23,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242675810] [2020-08-18 21:55:23,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:23,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:23,530 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 21:55:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:23,643 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 21:55:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:23,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:55:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:23,670 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 21:55:23,670 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 21:55:23,679 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 [2020-08-18 21:55:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 21:55:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 21:55:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 21:55:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 21:55:23,908 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 21:55:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:23,908 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 21:55:23,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 21:55:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:55:23,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:23,917 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, 1, 1, 1] [2020-08-18 21:55:23,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:55:23,917 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 21:55:23,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:23,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96263796] [2020-08-18 21:55:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:23,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96263796] [2020-08-18 21:55:23,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:23,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:23,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377002432] [2020-08-18 21:55:23,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:23,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:23,965 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 21:55:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:24,089 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 21:55:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:24,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:55:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:24,113 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 21:55:24,113 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 21:55:24,117 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 [2020-08-18 21:55:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 21:55:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 21:55:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 21:55:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 21:55:24,345 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 21:55:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:24,346 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 21:55:24,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 21:55:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:55:24,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:24,360 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] [2020-08-18 21:55:24,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:55:24,360 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 21:55:24,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:24,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500584080] [2020-08-18 21:55:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:24,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:24,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500584080] [2020-08-18 21:55:24,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:24,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:24,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965135171] [2020-08-18 21:55:24,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:24,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:24,399 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 21:55:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:24,552 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 21:55:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:24,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:55:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:24,574 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 21:55:24,574 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 21:55:24,579 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 [2020-08-18 21:55:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 21:55:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 21:55:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 21:55:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 21:55:24,798 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 21:55:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:24,798 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 21:55:24,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 21:55:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:55:24,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:24,899 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] [2020-08-18 21:55:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:55:24,899 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 21:55:24,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:24,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462281964] [2020-08-18 21:55:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:24,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:24,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462281964] [2020-08-18 21:55:24,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:24,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:24,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114678160] [2020-08-18 21:55:24,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:24,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:24,922 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 21:55:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:25,115 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 21:55:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:25,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:55:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:25,142 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 21:55:25,143 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 21:55:25,166 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 [2020-08-18 21:55:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 21:55:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 21:55:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 21:55:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 21:55:25,583 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 21:55:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:25,583 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 21:55:25,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 21:55:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:55:25,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:25,600 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] [2020-08-18 21:55:25,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:55:25,600 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:25,600 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 21:55:25,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:25,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978121670] [2020-08-18 21:55:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:25,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:25,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978121670] [2020-08-18 21:55:25,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:25,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:25,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877324669] [2020-08-18 21:55:25,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:25,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:25,628 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 21:55:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:25,789 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 21:55:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:25,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:55:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:25,821 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 21:55:25,821 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 21:55:25,840 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 [2020-08-18 21:55:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 21:55:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 21:55:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 21:55:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 21:55:26,683 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 21:55:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,684 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 21:55:26,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 21:55:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:55:26,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,700 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] [2020-08-18 21:55:26,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 21:55:26,701 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 21:55:26,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613627097] [2020-08-18 21:55:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613627097] [2020-08-18 21:55:26,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544051204] [2020-08-18 21:55:26,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,733 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 21:55:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,968 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 21:55:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:55:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,022 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 21:55:27,022 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 21:55:27,032 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 [2020-08-18 21:55:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 21:55:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 21:55:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 21:55:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 21:55:27,452 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 21:55:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,452 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 21:55:27,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 21:55:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:55:27,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,487 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] [2020-08-18 21:55:27,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 21:55:27,487 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 21:55:27,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722087029] [2020-08-18 21:55:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722087029] [2020-08-18 21:55:27,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591884814] [2020-08-18 21:55:27,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,513 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 21:55:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,800 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 21:55:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:55:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,801 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 21:55:27,801 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:55:27,860 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 [2020-08-18 21:55:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:55:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:55:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:55:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:55:27,861 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 21:55:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,861 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:55:27,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:55:27,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:55:27,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 21:55:27,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:55:27,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,891 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,891 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,891 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 21:55:27,891 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 21:55:27,891 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,891 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,892 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,893 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 21:55:27,894 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 21:55:27,895 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,895 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 21:55:27,896 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 21:55:27,897 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,897 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 21:55:27,897 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 21:55:27,897 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 21:55:27,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:55:27 BoogieIcfgContainer [2020-08-18 21:55:27,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:55:27,920 INFO L168 Benchmark]: Toolchain (without parser) took 8393.89 ms. Allocated memory was 146.8 MB in the beginning and 602.4 MB in the end (delta: 455.6 MB). Free memory was 106.0 MB in the beginning and 184.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 376.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,922 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.8 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.44 ms. Allocated memory is still 146.8 MB. Free memory was 105.8 MB in the beginning and 95.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,928 INFO L168 Benchmark]: Boogie Preprocessor took 131.33 ms. Allocated memory was 146.8 MB in the beginning and 206.0 MB in the end (delta: 59.2 MB). Free memory was 95.0 MB in the beginning and 183.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,928 INFO L168 Benchmark]: RCFGBuilder took 393.55 ms. Allocated memory is still 206.0 MB. Free memory was 183.7 MB in the beginning and 164.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,931 INFO L168 Benchmark]: TraceAbstraction took 7579.80 ms. Allocated memory was 206.0 MB in the beginning and 602.4 MB in the end (delta: 396.4 MB). Free memory was 164.1 MB in the beginning and 184.8 MB in the end (delta: -20.7 MB). Peak memory consumption was 375.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,934 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 146.8 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.44 ms. Allocated memory is still 146.8 MB. Free memory was 105.8 MB in the beginning and 95.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.33 ms. Allocated memory was 146.8 MB in the beginning and 206.0 MB in the end (delta: 59.2 MB). Free memory was 95.0 MB in the beginning and 183.7 MB in the end (delta: -88.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.55 ms. Allocated memory is still 206.0 MB. Free memory was 183.7 MB in the beginning and 164.1 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7579.80 ms. Allocated memory was 206.0 MB in the beginning and 602.4 MB in the end (delta: 396.4 MB). Free memory was 164.1 MB in the beginning and 184.8 MB in the end (delta: -20.7 MB). Peak memory consumption was 375.6 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: 7.4s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.6s, 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, 0.2s 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: 3.1s 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, 0.2s SatisfiabilityAnalysisTime, 0.6s 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...