/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 03:34:58,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 03:34:58,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 03:34:58,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 03:34:58,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 03:34:58,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 03:34:58,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 03:34:58,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 03:34:58,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 03:34:58,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 03:34:58,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 03:34:58,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 03:34:58,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:34:58,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:34:58,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:34:58,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:34:58,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:34:58,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:34:58,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:34:58,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:34:58,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:34:58,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:34:58,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:34:58,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:34:58,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 03:34:58,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:34:58,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:34:58,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:34:58,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 03:34:58,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:34:58,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:34:58,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:34:58,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:34:58,397 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:34:58,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:34:58,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:34:58,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:34:58,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:34:58,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:34:58,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:34:58,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:34:58,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:34:58,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:34:58,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:34:58,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:34:58,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:34:58,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:34:58,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:34:58,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:34:58,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:34:58,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:34:58,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:34:58,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:34:58,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:34:58,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:34:58,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:34:58,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:34:58,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:34:58,752 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:34:58,752 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 03:34:58,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d5b260f0/a9ecd08e463e4ae9a51fa04ff63a2f16/FLAGd86b8ae2d [2020-08-19 03:34:59,304 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:34:59,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 03:34:59,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d5b260f0/a9ecd08e463e4ae9a51fa04ff63a2f16/FLAGd86b8ae2d [2020-08-19 03:34:59,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d5b260f0/a9ecd08e463e4ae9a51fa04ff63a2f16 [2020-08-19 03:34:59,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:34:59,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:34:59,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:34:59,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:34:59,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:34:59,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:59" (1/1) ... [2020-08-19 03:34:59,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729581a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:34:59, skipping insertion in model container [2020-08-19 03:34:59,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:34:59" (1/1) ... [2020-08-19 03:34:59,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:34:59,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:34:59,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:34:59,959 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:35:00,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:35:00,147 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:35:00,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00 WrapperNode [2020-08-19 03:35:00,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:35:00,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:35:00,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:35:00,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:35:00,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... [2020-08-19 03:35:00,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:35:00,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:35:00,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:35:00,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:35:00,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:35:00,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:35:00,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:35:00,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:35:00,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:35:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 03:35:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:35:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:35:00,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:35:00,577 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:35:00,578 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 03:35:00,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:35:00 BoogieIcfgContainer [2020-08-19 03:35:00,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:35:00,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:35:00,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:35:00,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:35:00,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:34:59" (1/3) ... [2020-08-19 03:35:00,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0c478d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:35:00, skipping insertion in model container [2020-08-19 03:35:00,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:35:00" (2/3) ... [2020-08-19 03:35:00,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0c478d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:35:00, skipping insertion in model container [2020-08-19 03:35:00,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:35:00" (3/3) ... [2020-08-19 03:35:00,598 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-19 03:35:00,613 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:35:00,624 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:35:00,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:35:00,678 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:35:00,679 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:35:00,679 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:35:00,679 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:35:00,680 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:35:00,680 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:35:00,680 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:35:00,681 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:35:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-19 03:35:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 03:35:00,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:00,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:00,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-19 03:35:00,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:00,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252765045] [2020-08-19 03:35:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:00,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252765045] [2020-08-19 03:35:00,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:00,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:00,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154727516] [2020-08-19 03:35:00,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:00,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:00,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:00,983 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-19 03:35:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,050 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-19 03:35:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 03:35:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,068 INFO L225 Difference]: With dead ends: 87 [2020-08-19 03:35:01,068 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 03:35:01,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 03:35:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-19 03:35:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 03:35:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-19 03:35:01,127 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-19 03:35:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,127 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-19 03:35:01,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-19 03:35:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 03:35:01,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:35:01,130 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-19 03:35:01,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143131906] [2020-08-19 03:35:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143131906] [2020-08-19 03:35:01,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856462326] [2020-08-19 03:35:01,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,217 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-19 03:35:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,248 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-19 03:35:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 03:35:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,251 INFO L225 Difference]: With dead ends: 117 [2020-08-19 03:35:01,252 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 03:35:01,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 03:35:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-19 03:35:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 03:35:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-19 03:35:01,266 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-19 03:35:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,267 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-19 03:35:01,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-19 03:35:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 03:35:01,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,268 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] [2020-08-19 03:35:01,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:35:01,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-19 03:35:01,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729253626] [2020-08-19 03:35:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729253626] [2020-08-19 03:35:01,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017769773] [2020-08-19 03:35:01,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,328 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-19 03:35:01,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,370 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-19 03:35:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 03:35:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,375 INFO L225 Difference]: With dead ends: 108 [2020-08-19 03:35:01,375 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 03:35:01,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 03:35:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-19 03:35:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 03:35:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-19 03:35:01,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-19 03:35:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,422 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-19 03:35:01,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-19 03:35:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 03:35:01,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:35:01,425 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-19 03:35:01,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244811045] [2020-08-19 03:35:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244811045] [2020-08-19 03:35:01,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237038587] [2020-08-19 03:35:01,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,474 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-19 03:35:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,498 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-19 03:35:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 03:35:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,501 INFO L225 Difference]: With dead ends: 136 [2020-08-19 03:35:01,501 INFO L226 Difference]: Without dead ends: 134 [2020-08-19 03:35:01,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-19 03:35:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-19 03:35:01,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 03:35:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-19 03:35:01,518 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-19 03:35:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,518 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-19 03:35:01,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-19 03:35:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 03:35:01,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:35:01,522 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,523 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-19 03:35:01,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542402067] [2020-08-19 03:35:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542402067] [2020-08-19 03:35:01,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028328896] [2020-08-19 03:35:01,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,645 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-19 03:35:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,701 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-19 03:35:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 03:35:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,709 INFO L225 Difference]: With dead ends: 224 [2020-08-19 03:35:01,709 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 03:35:01,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 03:35:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-19 03:35:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-19 03:35:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-19 03:35:01,740 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-19 03:35:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,743 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-19 03:35:01,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-19 03:35:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:01,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:35:01,747 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-19 03:35:01,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844050997] [2020-08-19 03:35:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844050997] [2020-08-19 03:35:01,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176583063] [2020-08-19 03:35:01,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,836 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-19 03:35:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,855 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-19 03:35:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,858 INFO L225 Difference]: With dead ends: 201 [2020-08-19 03:35:01,859 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 03:35:01,860 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 [2020-08-19 03:35:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 03:35:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 03:35:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 03:35:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-19 03:35:01,885 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-19 03:35:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,886 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-19 03:35:01,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-19 03:35:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:01,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:35:01,888 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-19 03:35:01,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905524885] [2020-08-19 03:35:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:01,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905524885] [2020-08-19 03:35:01,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:01,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:01,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202221347] [2020-08-19 03:35:01,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:01,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,921 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-19 03:35:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:01,939 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-19 03:35:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:01,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:01,942 INFO L225 Difference]: With dead ends: 252 [2020-08-19 03:35:01,942 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 03:35:01,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 03:35:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-19 03:35:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 03:35:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-19 03:35:01,958 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-19 03:35:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:01,958 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-19 03:35:01,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-19 03:35:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:35:01,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:01,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:01,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:35:01,961 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-19 03:35:01,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:01,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958786614] [2020-08-19 03:35:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958786614] [2020-08-19 03:35:02,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022912359] [2020-08-19 03:35:02,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,004 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-19 03:35:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,036 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-19 03:35:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 03:35:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,039 INFO L225 Difference]: With dead ends: 432 [2020-08-19 03:35:02,039 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 03:35:02,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 03:35:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 03:35:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 03:35:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-19 03:35:02,058 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-19 03:35:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,058 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-19 03:35:02,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-19 03:35:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:02,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:35:02,061 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-19 03:35:02,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631383133] [2020-08-19 03:35:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631383133] [2020-08-19 03:35:02,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560294026] [2020-08-19 03:35:02,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,091 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-19 03:35:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,115 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-19 03:35:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,118 INFO L225 Difference]: With dead ends: 384 [2020-08-19 03:35:02,118 INFO L226 Difference]: Without dead ends: 262 [2020-08-19 03:35:02,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-19 03:35:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-19 03:35:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-19 03:35:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-19 03:35:02,135 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-19 03:35:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,135 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-19 03:35:02,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-19 03:35:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:02,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 03:35:02,138 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-19 03:35:02,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145815030] [2020-08-19 03:35:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145815030] [2020-08-19 03:35:02,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992593747] [2020-08-19 03:35:02,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,176 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-19 03:35:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,204 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-19 03:35:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,208 INFO L225 Difference]: With dead ends: 476 [2020-08-19 03:35:02,208 INFO L226 Difference]: Without dead ends: 474 [2020-08-19 03:35:02,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-19 03:35:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-19 03:35:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 03:35:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-19 03:35:02,223 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-19 03:35:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,223 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-19 03:35:02,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-19 03:35:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 03:35:02,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 03:35:02,227 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-19 03:35:02,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693224729] [2020-08-19 03:35:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693224729] [2020-08-19 03:35:02,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864899626] [2020-08-19 03:35:02,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,252 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-19 03:35:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,275 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-19 03:35:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 03:35:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,279 INFO L225 Difference]: With dead ends: 844 [2020-08-19 03:35:02,280 INFO L226 Difference]: Without dead ends: 498 [2020-08-19 03:35:02,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-19 03:35:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-19 03:35:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-19 03:35:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-19 03:35:02,298 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-19 03:35:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,298 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-19 03:35:02,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-19 03:35:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:02,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 03:35:02,301 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-19 03:35:02,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909828677] [2020-08-19 03:35:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909828677] [2020-08-19 03:35:02,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783058644] [2020-08-19 03:35:02,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,328 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-19 03:35:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,348 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-19 03:35:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,352 INFO L225 Difference]: With dead ends: 744 [2020-08-19 03:35:02,352 INFO L226 Difference]: Without dead ends: 506 [2020-08-19 03:35:02,353 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 [2020-08-19 03:35:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-19 03:35:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-19 03:35:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-19 03:35:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-19 03:35:02,369 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-19 03:35:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,370 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-19 03:35:02,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-19 03:35:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:02,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 03:35:02,372 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-19 03:35:02,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675474049] [2020-08-19 03:35:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675474049] [2020-08-19 03:35:02,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827191931] [2020-08-19 03:35:02,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,401 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-19 03:35:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,437 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-19 03:35:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,445 INFO L225 Difference]: With dead ends: 908 [2020-08-19 03:35:02,445 INFO L226 Difference]: Without dead ends: 906 [2020-08-19 03:35:02,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-19 03:35:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-19 03:35:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-19 03:35:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-19 03:35:02,468 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-19 03:35:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,469 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-19 03:35:02,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-19 03:35:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 03:35:02,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 03:35:02,471 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-19 03:35:02,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945775198] [2020-08-19 03:35:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945775198] [2020-08-19 03:35:02,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889905797] [2020-08-19 03:35:02,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,523 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-19 03:35:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,560 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-19 03:35:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 03:35:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,566 INFO L225 Difference]: With dead ends: 1660 [2020-08-19 03:35:02,566 INFO L226 Difference]: Without dead ends: 970 [2020-08-19 03:35:02,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-19 03:35:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-19 03:35:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-19 03:35:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-19 03:35:02,609 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-19 03:35:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,610 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-19 03:35:02,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-19 03:35:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:02,612 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 03:35:02,613 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-19 03:35:02,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299010224] [2020-08-19 03:35:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299010224] [2020-08-19 03:35:02,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119323614] [2020-08-19 03:35:02,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,655 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-19 03:35:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,701 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-19 03:35:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,708 INFO L225 Difference]: With dead ends: 1452 [2020-08-19 03:35:02,708 INFO L226 Difference]: Without dead ends: 986 [2020-08-19 03:35:02,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-19 03:35:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-19 03:35:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-19 03:35:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-19 03:35:02,741 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-19 03:35:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,743 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-19 03:35:02,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-19 03:35:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:02,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 03:35:02,745 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-19 03:35:02,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358431075] [2020-08-19 03:35:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358431075] [2020-08-19 03:35:02,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816216293] [2020-08-19 03:35:02,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,786 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-19 03:35:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,828 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-19 03:35:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,838 INFO L225 Difference]: With dead ends: 1740 [2020-08-19 03:35:02,838 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 03:35:02,840 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 [2020-08-19 03:35:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 03:35:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-19 03:35:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-19 03:35:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-19 03:35:02,889 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-19 03:35:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:02,890 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-19 03:35:02,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-19 03:35:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 03:35:02,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:02,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:02,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 03:35:02,894 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-19 03:35:02,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:02,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625287924] [2020-08-19 03:35:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:02,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625287924] [2020-08-19 03:35:02,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:02,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:02,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697959899] [2020-08-19 03:35:02,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:02,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:02,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:02,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:02,925 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-19 03:35:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:02,986 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-19 03:35:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:02,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 03:35:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:02,998 INFO L225 Difference]: With dead ends: 3276 [2020-08-19 03:35:02,998 INFO L226 Difference]: Without dead ends: 1898 [2020-08-19 03:35:03,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-19 03:35:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-19 03:35:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-19 03:35:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-19 03:35:03,088 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-19 03:35:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,089 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-19 03:35:03,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-19 03:35:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:03,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 03:35:03,094 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-19 03:35:03,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773986392] [2020-08-19 03:35:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773986392] [2020-08-19 03:35:03,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964531630] [2020-08-19 03:35:03,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,133 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-19 03:35:03,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,199 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-19 03:35:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,211 INFO L225 Difference]: With dead ends: 2844 [2020-08-19 03:35:03,212 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 03:35:03,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 03:35:03,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-19 03:35:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-19 03:35:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-19 03:35:03,298 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-19 03:35:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,299 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-19 03:35:03,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-19 03:35:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:03,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 03:35:03,303 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-19 03:35:03,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153969501] [2020-08-19 03:35:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153969501] [2020-08-19 03:35:03,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817646486] [2020-08-19 03:35:03,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,369 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-19 03:35:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,429 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-19 03:35:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,445 INFO L225 Difference]: With dead ends: 3340 [2020-08-19 03:35:03,445 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 03:35:03,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 03:35:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-19 03:35:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-19 03:35:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-19 03:35:03,529 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-19 03:35:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,529 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-19 03:35:03,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-19 03:35:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 03:35:03,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 03:35:03,535 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-19 03:35:03,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778446798] [2020-08-19 03:35:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778446798] [2020-08-19 03:35:03,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597556835] [2020-08-19 03:35:03,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,559 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-19 03:35:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,624 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-19 03:35:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 03:35:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,643 INFO L225 Difference]: With dead ends: 6476 [2020-08-19 03:35:03,643 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 03:35:03,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 03:35:03,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-19 03:35:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-19 03:35:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-19 03:35:03,753 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-19 03:35:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,753 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-19 03:35:03,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-19 03:35:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:03,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:03,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:03,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 03:35:03,759 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-19 03:35:03,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:03,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493574635] [2020-08-19 03:35:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:03,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493574635] [2020-08-19 03:35:03,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:03,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:03,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636028537] [2020-08-19 03:35:03,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:03,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,781 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-19 03:35:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:03,869 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-19 03:35:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:03,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:03,887 INFO L225 Difference]: With dead ends: 5580 [2020-08-19 03:35:03,888 INFO L226 Difference]: Without dead ends: 3786 [2020-08-19 03:35:03,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-19 03:35:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-19 03:35:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-19 03:35:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-19 03:35:03,997 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-19 03:35:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:03,997 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-19 03:35:03,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-19 03:35:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:04,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:04,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 03:35:04,003 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-19 03:35:04,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829820521] [2020-08-19 03:35:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829820521] [2020-08-19 03:35:04,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111190324] [2020-08-19 03:35:04,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,025 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-19 03:35:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,135 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-19 03:35:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,169 INFO L225 Difference]: With dead ends: 10956 [2020-08-19 03:35:04,170 INFO L226 Difference]: Without dead ends: 7306 [2020-08-19 03:35:04,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-19 03:35:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-19 03:35:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 03:35:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-19 03:35:04,525 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-19 03:35:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,525 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-19 03:35:04,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-19 03:35:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 03:35:04,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:04,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 03:35:04,534 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-19 03:35:04,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896777576] [2020-08-19 03:35:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:04,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896777576] [2020-08-19 03:35:04,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:04,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:04,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980819723] [2020-08-19 03:35:04,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:04,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,563 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-19 03:35:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:04,684 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-19 03:35:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:04,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 03:35:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:04,714 INFO L225 Difference]: With dead ends: 8076 [2020-08-19 03:35:04,714 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 03:35:04,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 03:35:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-19 03:35:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 03:35:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-19 03:35:04,941 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-19 03:35:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:04,941 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-19 03:35:04,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-19 03:35:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:35:04,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:04,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:04,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 03:35:04,958 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-19 03:35:04,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:04,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858450289] [2020-08-19 03:35:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:04,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:05,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858450289] [2020-08-19 03:35:05,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805978476] [2020-08-19 03:35:05,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,002 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-19 03:35:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,243 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-19 03:35:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 03:35:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,269 INFO L225 Difference]: With dead ends: 12172 [2020-08-19 03:35:05,269 INFO L226 Difference]: Without dead ends: 12170 [2020-08-19 03:35:05,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-19 03:35:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-19 03:35:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-19 03:35:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-19 03:35:05,503 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-19 03:35:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:05,504 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-19 03:35:05,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-19 03:35:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 03:35:05,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:05,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:05,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 03:35:05,521 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:05,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:05,521 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-19 03:35:05,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:05,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228890424] [2020-08-19 03:35:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:05,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228890424] [2020-08-19 03:35:05,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:05,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:05,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085533194] [2020-08-19 03:35:05,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:05,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,546 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-19 03:35:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:05,850 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-19 03:35:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:05,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 03:35:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:05,877 INFO L225 Difference]: With dead ends: 25228 [2020-08-19 03:35:05,877 INFO L226 Difference]: Without dead ends: 14218 [2020-08-19 03:35:05,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-19 03:35:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-19 03:35:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-19 03:35:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-19 03:35:06,211 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-19 03:35:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:06,212 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-19 03:35:06,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-19 03:35:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 03:35:06,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:06,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:06,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 03:35:06,230 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-19 03:35:06,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:06,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498449228] [2020-08-19 03:35:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:06,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498449228] [2020-08-19 03:35:06,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:06,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:06,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159282449] [2020-08-19 03:35:06,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:06,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,259 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-19 03:35:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:06,785 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-19 03:35:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:06,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 03:35:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:06,814 INFO L225 Difference]: With dead ends: 21516 [2020-08-19 03:35:06,815 INFO L226 Difference]: Without dead ends: 14602 [2020-08-19 03:35:06,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-19 03:35:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-19 03:35:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-19 03:35:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-19 03:35:07,162 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-19 03:35:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:07,163 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-19 03:35:07,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-19 03:35:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 03:35:07,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:07,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:07,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 03:35:07,181 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-19 03:35:07,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:07,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102071410] [2020-08-19 03:35:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:07,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102071410] [2020-08-19 03:35:07,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:07,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:07,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188868491] [2020-08-19 03:35:07,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:07,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:07,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:07,206 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-19 03:35:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:07,525 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-19 03:35:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:07,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 03:35:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:07,568 INFO L225 Difference]: With dead ends: 23562 [2020-08-19 03:35:07,568 INFO L226 Difference]: Without dead ends: 23560 [2020-08-19 03:35:07,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-19 03:35:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-19 03:35:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-19 03:35:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-19 03:35:07,962 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-19 03:35:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:07,962 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-19 03:35:07,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-19 03:35:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 03:35:07,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:35:07,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:35:07,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 03:35:07,996 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:35:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:35:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-19 03:35:07,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:35:07,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840640065] [2020-08-19 03:35:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:35:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:35:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:35:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:35:08,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840640065] [2020-08-19 03:35:08,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:35:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:35:08,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111351949] [2020-08-19 03:35:08,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:35:08,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:35:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:35:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:08,028 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-19 03:35:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:35:08,412 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-19 03:35:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:35:08,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 03:35:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:35:08,413 INFO L225 Difference]: With dead ends: 50184 [2020-08-19 03:35:08,413 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 03:35:08,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:35:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 03:35:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 03:35:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 03:35:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 03:35:08,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-19 03:35:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:35:08,473 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 03:35:08,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:35:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 03:35:08,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 03:35:08,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 03:35:08,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 03:35:08,502 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 03:35:08,502 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:35:08,502 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 03:35:08,502 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 03:35:08,502 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 03:35:08,502 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-19 03:35:08,503 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-19 03:35:08,504 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-19 03:35:08,505 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-19 03:35:08,506 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-19 03:35:08,506 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-19 03:35:08,506 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-19 03:35:08,506 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,506 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,506 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-19 03:35:08,506 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-19 03:35:08,507 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-19 03:35:08,508 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-19 03:35:08,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:35:08 BoogieIcfgContainer [2020-08-19 03:35:08,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:35:08,528 INFO L168 Benchmark]: Toolchain (without parser) took 8848.59 ms. Allocated memory was 147.8 MB in the beginning and 618.1 MB in the end (delta: 470.3 MB). Free memory was 102.3 MB in the beginning and 375.2 MB in the end (delta: -272.8 MB). Peak memory consumption was 197.5 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,530 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.83 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 102.3 MB in the beginning and 182.6 MB in the end (delta: -80.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,534 INFO L168 Benchmark]: Boogie Preprocessor took 39.74 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,534 INFO L168 Benchmark]: RCFGBuilder took 395.91 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 161.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,535 INFO L168 Benchmark]: TraceAbstraction took 7938.08 ms. Allocated memory was 203.9 MB in the beginning and 618.1 MB in the end (delta: 414.2 MB). Free memory was 161.1 MB in the beginning and 375.2 MB in the end (delta: -214.1 MB). Peak memory consumption was 200.1 MB. Max. memory is 7.1 GB. [2020-08-19 03:35:08,540 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 468.83 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 102.3 MB in the beginning and 182.6 MB in the end (delta: -80.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.74 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 180.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.91 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 161.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7938.08 ms. Allocated memory was 203.9 MB in the beginning and 618.1 MB in the end (delta: 414.2 MB). Free memory was 161.1 MB in the beginning and 375.2 MB in the end (delta: -214.1 MB). Peak memory consumption was 200.1 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: 7.8s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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: 2.6s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...