/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:28:52,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:52,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:52,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:52,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:52,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:52,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:52,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:52,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:52,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:52,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:52,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:52,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:52,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:52,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:52,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:52,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:52,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:52,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:52,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:52,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:52,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:52,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:52,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:52,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 15:28:52,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 15:28:52,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 15:28:52,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 15:28:52,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 15:28:52,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 15:28:52,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:28:52,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:28:52,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:28:52,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:28:52,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:28:52,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:28:52,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:28:52,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:28:52,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:52,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:52,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:52,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:28:52,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:52,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:52,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:52,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:52,471 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:52,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:52,472 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:52,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:52,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:52,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:52,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:52,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:52,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:52,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:52,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:52,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:52,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:52,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:52,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:52,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:52,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:52,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:52,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:52,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:52,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:52,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:52,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:52,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:52,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:52,478 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 -> false [2020-08-18 15:28:52,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:52,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:52,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:52,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:52,821 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:52,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 15:28:52,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94a13f3e1/d9c7d7c699024b01a525cb854bc58f8d/FLAG5f2e9d2d7 [2020-08-18 15:28:53,394 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:53,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 15:28:53,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94a13f3e1/d9c7d7c699024b01a525cb854bc58f8d/FLAG5f2e9d2d7 [2020-08-18 15:28:53,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94a13f3e1/d9c7d7c699024b01a525cb854bc58f8d [2020-08-18 15:28:53,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:53,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:53,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:53,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:53,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:53,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:53" (1/1) ... [2020-08-18 15:28:53,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9fa743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:53, skipping insertion in model container [2020-08-18 15:28:53,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:53" (1/1) ... [2020-08-18 15:28:53,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:53,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:53,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:53,984 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:54,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:54,069 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:54,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54 WrapperNode [2020-08-18 15:28:54,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:54,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:54,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:54,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:54,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... [2020-08-18 15:28:54,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:54,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:54,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:54,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:54,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:54,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:54,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:54,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:54,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:28:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:54,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:54,565 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:54,566 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:28:54,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:54 BoogieIcfgContainer [2020-08-18 15:28:54,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:54,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:54,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:54,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:54,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:53" (1/3) ... [2020-08-18 15:28:54,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb5d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:54, skipping insertion in model container [2020-08-18 15:28:54,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:54" (2/3) ... [2020-08-18 15:28:54,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afb5d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:54, skipping insertion in model container [2020-08-18 15:28:54,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:54" (3/3) ... [2020-08-18 15:28:54,579 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 15:28:54,593 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:54,601 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:54,618 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:54,649 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:54,649 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:54,649 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:54,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:54,650 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:54,650 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:54,650 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:54,650 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 15:28:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:28:54,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:54,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:54,689 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:54,695 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 15:28:54,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:54,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772785357] [2020-08-18 15:28:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:54,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772785357] [2020-08-18 15:28:54,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:54,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:54,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393164758] [2020-08-18 15:28:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:54,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:54,940 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 15:28:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,006 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 15:28:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:28:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,029 INFO L225 Difference]: With dead ends: 93 [2020-08-18 15:28:55,029 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:28:55,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:28:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 15:28:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 15:28:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 15:28:55,086 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 15:28:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,087 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 15:28:55,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,087 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 15:28:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:28:55,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:28:55,090 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 15:28:55,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104423323] [2020-08-18 15:28:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104423323] [2020-08-18 15:28:55,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829483452] [2020-08-18 15:28:55,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,192 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 15:28:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,234 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 15:28:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:28:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,237 INFO L225 Difference]: With dead ends: 127 [2020-08-18 15:28:55,238 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:28:55,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:28:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 15:28:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 15:28:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 15:28:55,251 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 15:28:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,252 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 15:28:55,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 15:28:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:28:55,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:28:55,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 15:28:55,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223743799] [2020-08-18 15:28:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223743799] [2020-08-18 15:28:55,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314976366] [2020-08-18 15:28:55,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,314 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 15:28:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,346 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 15:28:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:28:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,348 INFO L225 Difference]: With dead ends: 117 [2020-08-18 15:28:55,348 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 15:28:55,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 15:28:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 15:28:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 15:28:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 15:28:55,359 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 15:28:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,359 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 15:28:55,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 15:28:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:28:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:28:55,361 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 15:28:55,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380187147] [2020-08-18 15:28:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380187147] [2020-08-18 15:28:55,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277486204] [2020-08-18 15:28:55,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,446 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 15:28:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,472 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 15:28:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:28:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,474 INFO L225 Difference]: With dead ends: 148 [2020-08-18 15:28:55,474 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 15:28:55,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 15:28:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 15:28:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 15:28:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 15:28:55,488 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 15:28:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,489 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 15:28:55,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 15:28:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 15:28:55,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:28:55,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 15:28:55,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201608060] [2020-08-18 15:28:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201608060] [2020-08-18 15:28:55,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289718480] [2020-08-18 15:28:55,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,539 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 15:28:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,566 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 15:28:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 15:28:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,569 INFO L225 Difference]: With dead ends: 244 [2020-08-18 15:28:55,569 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 15:28:55,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 15:28:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 15:28:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 15:28:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 15:28:55,586 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 15:28:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,587 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 15:28:55,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 15:28:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:28:55,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:28:55,589 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 15:28:55,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651567685] [2020-08-18 15:28:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651567685] [2020-08-18 15:28:55,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895086760] [2020-08-18 15:28:55,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,657 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 15:28:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,689 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 15:28:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:28:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,691 INFO L225 Difference]: With dead ends: 219 [2020-08-18 15:28:55,691 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 15:28:55,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 15:28:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 15:28:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 15:28:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 15:28:55,721 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 15:28:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,721 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 15:28:55,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 15:28:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:28:55,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:28:55,728 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 15:28:55,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114211487] [2020-08-18 15:28:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114211487] [2020-08-18 15:28:55,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421579252] [2020-08-18 15:28:55,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,800 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 15:28:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,824 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 15:28:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:28:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,829 INFO L225 Difference]: With dead ends: 276 [2020-08-18 15:28:55,829 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 15:28:55,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 15:28:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 15:28:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 15:28:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 15:28:55,860 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 15:28:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,860 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 15:28:55,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 15:28:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 15:28:55,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:28:55,866 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 15:28:55,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73099634] [2020-08-18 15:28:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:55,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73099634] [2020-08-18 15:28:55,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:55,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:55,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536874735] [2020-08-18 15:28:55,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:55,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:55,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:55,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,924 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 15:28:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:55,960 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 15:28:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:55,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 15:28:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:55,962 INFO L225 Difference]: With dead ends: 472 [2020-08-18 15:28:55,962 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 15:28:55,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 15:28:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 15:28:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 15:28:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 15:28:55,981 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 15:28:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:55,981 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 15:28:55,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 15:28:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 15:28:55,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:55,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:55,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:28:55,984 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 15:28:55,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:55,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792131862] [2020-08-18 15:28:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792131862] [2020-08-18 15:28:56,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160345882] [2020-08-18 15:28:56,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,013 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 15:28:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,032 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 15:28:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 15:28:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,035 INFO L225 Difference]: With dead ends: 420 [2020-08-18 15:28:56,035 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 15:28:56,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 15:28:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 15:28:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 15:28:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 15:28:56,049 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 15:28:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,049 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 15:28:56,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 15:28:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 15:28:56,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:28:56,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,052 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 15:28:56,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072899170] [2020-08-18 15:28:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072899170] [2020-08-18 15:28:56,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063866472] [2020-08-18 15:28:56,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,079 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 15:28:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,099 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 15:28:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 15:28:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,102 INFO L225 Difference]: With dead ends: 524 [2020-08-18 15:28:56,103 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 15:28:56,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 15:28:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 15:28:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 15:28:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 15:28:56,120 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 15:28:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,120 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 15:28:56,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,120 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 15:28:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 15:28:56,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:28:56,122 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 15:28:56,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979199075] [2020-08-18 15:28:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979199075] [2020-08-18 15:28:56,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911546380] [2020-08-18 15:28:56,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,154 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 15:28:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,179 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 15:28:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 15:28:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,183 INFO L225 Difference]: With dead ends: 924 [2020-08-18 15:28:56,183 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 15:28:56,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 15:28:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 15:28:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 15:28:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 15:28:56,203 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 15:28:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,204 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 15:28:56,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 15:28:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:56,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:28:56,206 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 15:28:56,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804254988] [2020-08-18 15:28:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804254988] [2020-08-18 15:28:56,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562694450] [2020-08-18 15:28:56,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,234 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 15:28:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,255 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 15:28:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 15:28:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,259 INFO L225 Difference]: With dead ends: 816 [2020-08-18 15:28:56,259 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 15:28:56,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 15:28:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 15:28:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 15:28:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 15:28:56,279 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 15:28:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,279 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 15:28:56,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 15:28:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:56,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:28:56,282 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 15:28:56,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140584278] [2020-08-18 15:28:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140584278] [2020-08-18 15:28:56,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015551767] [2020-08-18 15:28:56,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,312 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 15:28:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,339 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 15:28:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 15:28:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,345 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 15:28:56,346 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 15:28:56,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 15:28:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 15:28:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 15:28:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 15:28:56,377 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 15:28:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,377 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 15:28:56,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 15:28:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 15:28:56,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:28:56,381 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 15:28:56,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320626553] [2020-08-18 15:28:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320626553] [2020-08-18 15:28:56,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262597997] [2020-08-18 15:28:56,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,411 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 15:28:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,459 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 15:28:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 15:28:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,465 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 15:28:56,465 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 15:28:56,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 15:28:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 15:28:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 15:28:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 15:28:56,500 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 15:28:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,501 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 15:28:56,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 15:28:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:28:56,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:28:56,503 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,504 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 15:28:56,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329771671] [2020-08-18 15:28:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329771671] [2020-08-18 15:28:56,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103884381] [2020-08-18 15:28:56,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,548 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 15:28:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,581 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 15:28:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 15:28:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,587 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 15:28:56,587 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 15:28:56,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 15:28:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 15:28:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 15:28:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 15:28:56,622 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 15:28:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,622 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 15:28:56,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 15:28:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:28:56,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 15:28:56,625 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 15:28:56,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218488730] [2020-08-18 15:28:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218488730] [2020-08-18 15:28:56,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617802490] [2020-08-18 15:28:56,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,649 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 15:28:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,685 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 15:28:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 15:28:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,696 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 15:28:56,696 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 15:28:56,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 15:28:56,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 15:28:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 15:28:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 15:28:56,749 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 15:28:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 15:28:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 15:28:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 15:28:56,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 15:28:56,754 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 15:28:56,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804311447] [2020-08-18 15:28:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804311447] [2020-08-18 15:28:56,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379706911] [2020-08-18 15:28:56,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,777 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 15:28:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:56,826 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 15:28:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:56,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 15:28:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:56,839 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 15:28:56,839 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 15:28:56,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 15:28:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 15:28:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 15:28:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 15:28:56,934 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 15:28:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:56,935 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 15:28:56,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 15:28:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:28:56,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:56,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:56,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 15:28:56,940 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:56,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 15:28:56,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:56,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889631708] [2020-08-18 15:28:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:56,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889631708] [2020-08-18 15:28:56,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:56,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:56,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53260968] [2020-08-18 15:28:56,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:56,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:56,973 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 15:28:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,047 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 15:28:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 15:28:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,058 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 15:28:57,058 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 15:28:57,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 15:28:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 15:28:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 15:28:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 15:28:57,151 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 15:28:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,152 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 15:28:57,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 15:28:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:28:57,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 15:28:57,158 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 15:28:57,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809813993] [2020-08-18 15:28:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809813993] [2020-08-18 15:28:57,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020638353] [2020-08-18 15:28:57,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,182 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 15:28:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,286 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 15:28:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 15:28:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,309 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 15:28:57,309 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 15:28:57,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 15:28:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 15:28:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 15:28:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 15:28:57,422 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 15:28:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,422 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 15:28:57,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 15:28:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:28:57,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 15:28:57,429 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 15:28:57,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426034106] [2020-08-18 15:28:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:57,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426034106] [2020-08-18 15:28:57,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178414397] [2020-08-18 15:28:57,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,472 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 15:28:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,549 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 15:28:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 15:28:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,569 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 15:28:57,569 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 15:28:57,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 15:28:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 15:28:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 15:28:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 15:28:57,747 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 15:28:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,747 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 15:28:57,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 15:28:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:28:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 15:28:57,757 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 15:28:57,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074515286] [2020-08-18 15:28:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:57,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074515286] [2020-08-18 15:28:57,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445735136] [2020-08-18 15:28:57,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,786 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 15:28:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,852 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 15:28:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 15:28:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,890 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 15:28:57,891 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 15:28:57,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 15:28:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 15:28:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 15:28:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 15:28:58,070 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 15:28:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,070 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 15:28:58,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 15:28:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:28:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:58,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 15:28:58,080 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 15:28:58,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894010195] [2020-08-18 15:28:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:58,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894010195] [2020-08-18 15:28:58,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863592974] [2020-08-18 15:28:58,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,108 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 15:28:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,270 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 15:28:58,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 15:28:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,357 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 15:28:58,358 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 15:28:58,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 15:28:58,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 15:28:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 15:28:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 15:28:58,591 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 15:28:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,591 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 15:28:58,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 15:28:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 15:28:58,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:58,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 15:28:58,602 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 15:28:58,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610872860] [2020-08-18 15:28:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:58,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610872860] [2020-08-18 15:28:58,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878234248] [2020-08-18 15:28:58,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,643 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 15:28:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,783 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 15:28:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 15:28:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,803 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 15:28:58,803 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 15:28:58,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 15:28:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 15:28:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 15:28:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 15:28:59,074 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 15:28:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:59,074 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 15:28:59,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 15:28:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 15:28:59,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:59,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:59,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 15:28:59,087 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 15:28:59,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:59,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113901215] [2020-08-18 15:28:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:59,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113901215] [2020-08-18 15:28:59,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:59,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:59,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237442034] [2020-08-18 15:28:59,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:59,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:59,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:59,136 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 15:28:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:59,297 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 15:28:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:59,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 15:28:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:59,324 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 15:28:59,324 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 15:28:59,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 15:28:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 15:28:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 15:28:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 15:28:59,705 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 15:28:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:59,705 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 15:28:59,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 15:28:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 15:28:59,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:59,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:59,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 15:28:59,727 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 15:28:59,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:59,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727882433] [2020-08-18 15:28:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:59,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:28:59,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727882433] [2020-08-18 15:28:59,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:59,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:59,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874427061] [2020-08-18 15:28:59,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:59,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:59,752 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 15:28:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:59,949 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 15:28:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:59,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 15:28:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:59,982 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 15:28:59,983 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 15:29:00,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 15:29:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 15:29:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 15:29:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 15:29:00,474 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 15:29:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:00,475 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 15:29:00,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 15:29:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:29:00,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:00,495 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, 1] [2020-08-18 15:29:00,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 15:29:00,496 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 15:29:00,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:00,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990814456] [2020-08-18 15:29:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:00,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990814456] [2020-08-18 15:29:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:00,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:00,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436464365] [2020-08-18 15:29:00,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:00,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,523 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 15:29:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:00,705 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 15:29:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:00,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 15:29:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:00,736 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 15:29:00,736 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 15:29:00,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 15:29:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 15:29:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 15:29:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 15:29:01,581 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 15:29:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:01,582 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 15:29:01,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 15:29:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:29:01,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:01,601 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, 1] [2020-08-18 15:29:01,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 15:29:01,601 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 15:29:01,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:01,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390966450] [2020-08-18 15:29:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:01,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390966450] [2020-08-18 15:29:01,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:01,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:01,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785509382] [2020-08-18 15:29:01,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:01,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:01,630 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 15:29:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:01,895 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 15:29:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:01,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 15:29:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:02,040 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 15:29:02,040 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 15:29:02,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 15:29:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 15:29:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 15:29:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 15:29:02,475 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 15:29:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:02,476 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 15:29:02,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 15:29:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:29:02,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:02,513 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, 1] [2020-08-18 15:29:02,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 15:29:02,513 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 15:29:02,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:02,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506397954] [2020-08-18 15:29:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:02,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506397954] [2020-08-18 15:29:02,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:02,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:02,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196215660] [2020-08-18 15:29:02,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:02,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:02,537 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 15:29:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:03,023 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 15:29:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:03,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 15:29:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:03,081 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 15:29:03,082 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 15:29:03,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 15:29:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 15:29:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 15:29:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 15:29:03,669 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 15:29:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:03,669 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 15:29:03,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 15:29:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:29:03,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:03,704 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, 1, 1] [2020-08-18 15:29:03,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 15:29:03,901 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 15:29:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:03,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589360180] [2020-08-18 15:29:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:03,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589360180] [2020-08-18 15:29:03,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:03,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:03,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736321481] [2020-08-18 15:29:03,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:03,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:03,931 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 15:29:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:04,208 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 15:29:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:04,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 15:29:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:04,264 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 15:29:04,264 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 15:29:04,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 15:29:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 15:29:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 15:29:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 15:29:04,843 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 15:29:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:04,843 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 15:29:04,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 15:29:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:29:04,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:04,866 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, 1, 1] [2020-08-18 15:29:04,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 15:29:04,866 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 15:29:04,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:04,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380967102] [2020-08-18 15:29:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:04,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:04,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380967102] [2020-08-18 15:29:04,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:04,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:04,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185123868] [2020-08-18 15:29:04,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:04,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:04,897 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 15:29:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:05,630 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 15:29:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:05,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 15:29:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:05,688 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 15:29:05,688 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 15:29:05,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 15:29:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 15:29:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 15:29:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 15:29:07,209 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 15:29:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:07,209 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 15:29:07,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 15:29:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 15:29:07,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:29:07,244 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, 1, 1] [2020-08-18 15:29:07,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 15:29:07,245 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:29:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:29:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 15:29:07,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:29:07,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863120810] [2020-08-18 15:29:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:29:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:29:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:29:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:29:07,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863120810] [2020-08-18 15:29:07,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:29:07,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:29:07,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41248393] [2020-08-18 15:29:07,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:29:07,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:29:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:29:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:07,271 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 15:29:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:29:07,964 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 15:29:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:29:07,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 15:29:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:29:07,965 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 15:29:07,965 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:29:08,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:29:08,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:29:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:29:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:29:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:29:08,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 15:29:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:29:08,065 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:29:08,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:29:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:29:08,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:29:08,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 15:29:08,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:29:08,101 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:29:08,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:29:08,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:29:08,102 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 15:29:08,102 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 15:29:08,104 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 15:29:08,104 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,104 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,104 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,105 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 15:29:08,106 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 15:29:08,107 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,108 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,109 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 15:29:08,110 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 15:29:08,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:29:08 BoogieIcfgContainer [2020-08-18 15:29:08,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:29:08,141 INFO L168 Benchmark]: Toolchain (without parser) took 14379.04 ms. Allocated memory was 143.7 MB in the beginning and 1.1 GB in the end (delta: 941.1 MB). Free memory was 106.6 MB in the beginning and 394.0 MB in the end (delta: -287.4 MB). Peak memory consumption was 653.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,147 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 124.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.10 ms. Allocated memory is still 143.7 MB. Free memory was 106.2 MB in the beginning and 95.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,148 INFO L168 Benchmark]: Boogie Preprocessor took 117.49 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 95.3 MB in the beginning and 182.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,149 INFO L168 Benchmark]: RCFGBuilder took 382.11 ms. Allocated memory is still 205.0 MB. Free memory was 182.7 MB in the beginning and 162.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,149 INFO L168 Benchmark]: TraceAbstraction took 13566.48 ms. Allocated memory was 205.0 MB in the beginning and 1.1 GB in the end (delta: 879.8 MB). Free memory was 161.2 MB in the beginning and 394.0 MB in the end (delta: -232.8 MB). Peak memory consumption was 647.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:29:08,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 124.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.10 ms. Allocated memory is still 143.7 MB. Free memory was 106.2 MB in the beginning and 95.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.49 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 95.3 MB in the beginning and 182.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 382.11 ms. Allocated memory is still 205.0 MB. Free memory was 182.7 MB in the beginning and 162.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13566.48 ms. Allocated memory was 205.0 MB in the beginning and 1.1 GB in the end (delta: 879.8 MB). Free memory was 161.2 MB in the beginning and 394.0 MB in the end (delta: -232.8 MB). Peak memory consumption was 647.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.4s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 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, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...