/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -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 21:06:57,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:06:57,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:06:57,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:06:57,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:06:57,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:06:57,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:06:57,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:06:57,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:06:57,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:06:57,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:06:57,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:06:57,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:06:57,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:06:57,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:06:57,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:06:57,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:06:57,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:06:57,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:06:57,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:06:57,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:06:57,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:06:57,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:06:57,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:06:57,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:06:57,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:06:57,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:06:57,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:06:57,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:06:57,357 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:06:57,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:06:57,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:06:57,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:06:57,360 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:06:57,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:06:57,360 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:06:57,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:06:57,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:06:57,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:06:57,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:06:57,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:06:57,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:06:57,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:06:57,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:06:57,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:06:57,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:06:57,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:06:57,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:06:57,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:06:57,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:06:57,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:06:57,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:06:57,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:06:57,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:06:57,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:06:57,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:06:57,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:06:57,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:06:57,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:06:57,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:06:57,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:06:57,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:06:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:06:57,658 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:06:57,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 21:06:57,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80aecaf0e/4d4ba1d6505b409698c31aa3d6076c00/FLAG6d723cc7f [2020-08-18 21:06:58,205 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:06:58,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 21:06:58,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80aecaf0e/4d4ba1d6505b409698c31aa3d6076c00/FLAG6d723cc7f [2020-08-18 21:06:58,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80aecaf0e/4d4ba1d6505b409698c31aa3d6076c00 [2020-08-18 21:06:58,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:06:58,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:06:58,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:58,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:06:58,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:06:58,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3c9999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58, skipping insertion in model container [2020-08-18 21:06:58,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:06:58,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:06:58,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:58,775 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:06:58,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:06:58,822 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:06:58,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58 WrapperNode [2020-08-18 21:06:58,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:06:58,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:06:58,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:06:58,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:06:58,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... [2020-08-18 21:06:58,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:06:58,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:06:58,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:06:58,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:06:58,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:06:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:06:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:06:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:06:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:06:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:06:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:06:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:06:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:06:59,387 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:06:59,388 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:06:59,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:59 BoogieIcfgContainer [2020-08-18 21:06:59,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:06:59,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:06:59,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:06:59,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:06:59,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:06:58" (1/3) ... [2020-08-18 21:06:59,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe5d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:59, skipping insertion in model container [2020-08-18 21:06:59,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:06:58" (2/3) ... [2020-08-18 21:06:59,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe5d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:06:59, skipping insertion in model container [2020-08-18 21:06:59,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:06:59" (3/3) ... [2020-08-18 21:06:59,415 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 21:06:59,425 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:06:59,432 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:06:59,446 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:06:59,471 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:06:59,471 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:06:59,471 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:06:59,472 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:06:59,472 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:06:59,472 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:06:59,472 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:06:59,472 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:06:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 21:06:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:06:59,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,497 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 21:06:59,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932961614] [2020-08-18 21:06:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:59,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932961614] [2020-08-18 21:06:59,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:59,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057016823] [2020-08-18 21:06:59,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:59,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,750 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 21:06:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:06:59,824 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 21:06:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:06:59,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:06:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:06:59,839 INFO L225 Difference]: With dead ends: 93 [2020-08-18 21:06:59,840 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:06:59,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:06:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 21:06:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 21:06:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 21:06:59,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 21:06:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:06:59,896 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 21:06:59,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:06:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 21:06:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:06:59,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:06:59,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:06:59,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:06:59,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:06:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:06:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 21:06:59,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:06:59,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158145740] [2020-08-18 21:06:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:06:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:06:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:06:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:06:59,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158145740] [2020-08-18 21:06:59,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:06:59,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:06:59,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421629445] [2020-08-18 21:06:59,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:06:59,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:06:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:06:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:06:59,970 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 21:07:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,004 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 21:07:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:07:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,007 INFO L225 Difference]: With dead ends: 127 [2020-08-18 21:07:00,008 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:07:00,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:07:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 21:07:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 21:07:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 21:07:00,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 21:07:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,022 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 21:07:00,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 21:07:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:00,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:00,024 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 21:07:00,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442558955] [2020-08-18 21:07:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442558955] [2020-08-18 21:07:00,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858550419] [2020-08-18 21:07:00,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,086 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 21:07:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,130 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 21:07:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,133 INFO L225 Difference]: With dead ends: 117 [2020-08-18 21:07:00,133 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 21:07:00,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 21:07:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 21:07:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 21:07:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 21:07:00,145 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 21:07:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,145 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 21:07:00,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 21:07:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:00,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:00,147 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 21:07:00,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112111897] [2020-08-18 21:07:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112111897] [2020-08-18 21:07:00,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658638109] [2020-08-18 21:07:00,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,201 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 21:07:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,221 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 21:07:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,224 INFO L225 Difference]: With dead ends: 148 [2020-08-18 21:07:00,224 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 21:07:00,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 21:07:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 21:07:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 21:07:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 21:07:00,239 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 21:07:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,239 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 21:07:00,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 21:07:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:00,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:00,242 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,243 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 21:07:00,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524226787] [2020-08-18 21:07:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524226787] [2020-08-18 21:07:00,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542524575] [2020-08-18 21:07:00,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,324 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 21:07:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,369 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 21:07:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,371 INFO L225 Difference]: With dead ends: 244 [2020-08-18 21:07:00,371 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 21:07:00,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 21:07:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 21:07:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 21:07:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 21:07:00,408 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 21:07:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,409 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 21:07:00,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 21:07:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:00,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:00,411 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 21:07:00,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869105149] [2020-08-18 21:07:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,516 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 21:07:00,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869105149] [2020-08-18 21:07:00,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558310108] [2020-08-18 21:07:00,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,536 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 21:07:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,561 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 21:07:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,564 INFO L225 Difference]: With dead ends: 219 [2020-08-18 21:07:00,564 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 21:07:00,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 21:07:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 21:07:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 21:07:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 21:07:00,577 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 21:07:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,577 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 21:07:00,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 21:07:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:00,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:00,579 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 21:07:00,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016647616] [2020-08-18 21:07:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016647616] [2020-08-18 21:07:00,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289330007] [2020-08-18 21:07:00,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,615 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 21:07:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,633 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 21:07:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,636 INFO L225 Difference]: With dead ends: 276 [2020-08-18 21:07:00,636 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 21:07:00,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 21:07:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 21:07:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 21:07:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 21:07:00,649 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 21:07:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,650 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 21:07:00,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 21:07:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:00,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:00,653 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 21:07:00,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103759681] [2020-08-18 21:07:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103759681] [2020-08-18 21:07:00,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257253963] [2020-08-18 21:07:00,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,706 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 21:07:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,735 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 21:07:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,738 INFO L225 Difference]: With dead ends: 472 [2020-08-18 21:07:00,738 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 21:07:00,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 21:07:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 21:07:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 21:07:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 21:07:00,754 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 21:07:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,754 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 21:07:00,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 21:07:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:00,756 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:07:00,757 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 21:07:00,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578102126] [2020-08-18 21:07:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578102126] [2020-08-18 21:07:00,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369248483] [2020-08-18 21:07:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,788 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 21:07:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,807 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 21:07:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,810 INFO L225 Difference]: With dead ends: 420 [2020-08-18 21:07:00,810 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 21:07:00,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 21:07:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 21:07:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 21:07:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 21:07:00,825 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 21:07:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,825 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 21:07:00,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 21:07:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:00,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:07:00,828 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,829 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 21:07:00,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361982423] [2020-08-18 21:07:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361982423] [2020-08-18 21:07:00,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710663456] [2020-08-18 21:07:00,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,865 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 21:07:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:00,892 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 21:07:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:00,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:00,895 INFO L225 Difference]: With dead ends: 524 [2020-08-18 21:07:00,896 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 21:07:00,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 21:07:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 21:07:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 21:07:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 21:07:00,912 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 21:07:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:00,912 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 21:07:00,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 21:07:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:00,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:00,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:00,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:07:00,915 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 21:07:00,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:00,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980195714] [2020-08-18 21:07:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:00,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980195714] [2020-08-18 21:07:00,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:00,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:00,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136891758] [2020-08-18 21:07:00,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:00,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:00,965 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 21:07:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,004 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 21:07:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,009 INFO L225 Difference]: With dead ends: 924 [2020-08-18 21:07:01,009 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 21:07:01,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 21:07:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 21:07:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 21:07:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 21:07:01,035 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 21:07:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,036 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 21:07:01,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,036 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 21:07:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:07:01,041 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 21:07:01,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633276268] [2020-08-18 21:07:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633276268] [2020-08-18 21:07:01,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238042558] [2020-08-18 21:07:01,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,092 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 21:07:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,118 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 21:07:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,123 INFO L225 Difference]: With dead ends: 816 [2020-08-18 21:07:01,123 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 21:07:01,125 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 21:07:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 21:07:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 21:07:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 21:07:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 21:07:01,143 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 21:07:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,143 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 21:07:01,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 21:07:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:01,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:07:01,145 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 21:07:01,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660141571] [2020-08-18 21:07:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660141571] [2020-08-18 21:07:01,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650330558] [2020-08-18 21:07:01,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,193 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 21:07:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,219 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 21:07:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,225 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 21:07:01,225 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 21:07:01,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 21:07:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 21:07:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 21:07:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 21:07:01,254 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 21:07:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,254 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 21:07:01,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 21:07:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:01,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:07:01,257 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 21:07:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329312376] [2020-08-18 21:07:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329312376] [2020-08-18 21:07:01,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301800412] [2020-08-18 21:07:01,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,284 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 21:07:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,315 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 21:07:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,321 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 21:07:01,322 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 21:07:01,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 21:07:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 21:07:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 21:07:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 21:07:01,371 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 21:07:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,371 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 21:07:01,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 21:07:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:01,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:07:01,374 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 21:07:01,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222692927] [2020-08-18 21:07:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222692927] [2020-08-18 21:07:01,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897391167] [2020-08-18 21:07:01,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,398 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 21:07:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,425 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 21:07:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,431 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 21:07:01,432 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 21:07:01,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 21:07:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 21:07:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 21:07:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 21:07:01,466 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 21:07:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,466 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 21:07:01,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 21:07:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:01,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:07:01,469 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 21:07:01,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975525175] [2020-08-18 21:07:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975525175] [2020-08-18 21:07:01,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625842984] [2020-08-18 21:07:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,493 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 21:07:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,528 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 21:07:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,538 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 21:07:01,539 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 21:07:01,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 21:07:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 21:07:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 21:07:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 21:07:01,592 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 21:07:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,592 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 21:07:01,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 21:07:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:01,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:07:01,595 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 21:07:01,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366068512] [2020-08-18 21:07:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366068512] [2020-08-18 21:07:01,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151262471] [2020-08-18 21:07:01,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,617 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 21:07:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,661 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 21:07:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,671 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 21:07:01,671 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 21:07:01,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 21:07:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 21:07:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 21:07:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 21:07:01,736 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 21:07:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,736 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 21:07:01,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 21:07:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:01,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:07:01,739 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 21:07:01,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566518990] [2020-08-18 21:07:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566518990] [2020-08-18 21:07:01,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018867000] [2020-08-18 21:07:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,767 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 21:07:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,812 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 21:07:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:07:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,823 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 21:07:01,823 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 21:07:01,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 21:07:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 21:07:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 21:07:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 21:07:01,898 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 21:07:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,898 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 21:07:01,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 21:07:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:01,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:07:01,901 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 21:07:01,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034278592] [2020-08-18 21:07:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034278592] [2020-08-18 21:07:01,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541929867] [2020-08-18 21:07:01,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,923 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 21:07:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,971 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 21:07:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:07:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,988 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 21:07:01,988 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 21:07:01,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 21:07:02,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 21:07:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 21:07:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 21:07:02,070 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 21:07:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,070 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 21:07:02,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 21:07:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:02,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:07:02,075 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 21:07:02,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853818560] [2020-08-18 21:07:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853818560] [2020-08-18 21:07:02,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154668826] [2020-08-18 21:07:02,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,100 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 21:07:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,158 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 21:07:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:07:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,177 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 21:07:02,177 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 21:07:02,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 21:07:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 21:07:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 21:07:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 21:07:02,308 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 21:07:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,308 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 21:07:02,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 21:07:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:02,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:07:02,314 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 21:07:02,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935819739] [2020-08-18 21:07:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935819739] [2020-08-18 21:07:02,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914931506] [2020-08-18 21:07:02,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,336 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 21:07:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,392 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 21:07:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:07:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,410 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 21:07:02,411 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 21:07:02,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 21:07:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 21:07:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 21:07:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 21:07:02,515 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 21:07:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,516 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 21:07:02,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 21:07:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:02,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:07:02,521 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 21:07:02,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382757242] [2020-08-18 21:07:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382757242] [2020-08-18 21:07:02,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140523132] [2020-08-18 21:07:02,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,542 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 21:07:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,633 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 21:07:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:07:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,649 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 21:07:02,650 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 21:07:02,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 21:07:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 21:07:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 21:07:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 21:07:02,885 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 21:07:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,885 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 21:07:02,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 21:07:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 21:07:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:07:02,897 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 21:07:02,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927517156] [2020-08-18 21:07:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927517156] [2020-08-18 21:07:02,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162980915] [2020-08-18 21:07:02,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,953 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 21:07:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,069 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 21:07:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:03,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 21:07:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,088 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 21:07:03,088 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 21:07:03,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 21:07:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 21:07:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 21:07:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 21:07:03,344 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 21:07:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:03,345 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 21:07:03,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 21:07:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:03,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:03,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:03,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:07:03,360 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 21:07:03,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:03,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580690856] [2020-08-18 21:07:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:03,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580690856] [2020-08-18 21:07:03,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:03,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:03,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974047022] [2020-08-18 21:07:03,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:03,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:03,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:03,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:03,385 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 21:07:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:03,537 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 21:07:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:03,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:07:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:03,565 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 21:07:03,565 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 21:07:03,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 21:07:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 21:07:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 21:07:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 21:07:03,889 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 21:07:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:03,889 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 21:07:03,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 21:07:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 21:07:03,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:03,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:03,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:07:03,907 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 21:07:03,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:03,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445376476] [2020-08-18 21:07:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:03,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445376476] [2020-08-18 21:07:03,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:03,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:03,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892320909] [2020-08-18 21:07:03,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:03,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:03,930 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 21:07:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:04,115 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 21:07:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:04,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 21:07:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:04,146 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 21:07:04,146 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 21:07:04,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 21:07:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 21:07:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 21:07:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 21:07:04,569 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 21:07:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:04,570 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 21:07:04,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 21:07:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:07:04,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:04,590 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 21:07:04,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:07:04,590 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 21:07:04,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:04,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842948458] [2020-08-18 21:07:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:04,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842948458] [2020-08-18 21:07:04,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:04,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:04,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144157445] [2020-08-18 21:07:04,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:04,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:04,613 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 21:07:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:04,782 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 21:07:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:04,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 21:07:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:04,813 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 21:07:04,813 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 21:07:04,830 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 21:07:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 21:07:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 21:07:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 21:07:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 21:07:05,703 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 21:07:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:05,703 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 21:07:05,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 21:07:05,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:07:05,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:05,726 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, 1] [2020-08-18 21:07:05,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 21:07:05,727 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:05,727 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 21:07:05,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:05,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846062774] [2020-08-18 21:07:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:05,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846062774] [2020-08-18 21:07:05,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:05,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:05,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436577788] [2020-08-18 21:07:05,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:05,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:05,751 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 21:07:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,008 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 21:07:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 21:07:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,058 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 21:07:06,059 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 21:07:06,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 21:07:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 21:07:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 21:07:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 21:07:06,635 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 21:07:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,635 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 21:07:06,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 21:07:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 21:07:06,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,669 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 21:07:06,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 21:07:06,669 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 21:07:06,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334717937] [2020-08-18 21:07:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:06,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334717937] [2020-08-18 21:07:06,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307003165] [2020-08-18 21:07:06,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,690 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 21:07:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,014 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 21:07:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 21:07:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,068 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 21:07:07,069 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 21:07:07,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 21:07:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 21:07:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 21:07:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 21:07:07,819 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 21:07:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,819 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 21:07:07,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 21:07:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:07:07,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,844 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 21:07:07,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 21:07:07,845 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 21:07:07,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742410044] [2020-08-18 21:07:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742410044] [2020-08-18 21:07:07,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61445666] [2020-08-18 21:07:07,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,869 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 21:07:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,490 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 21:07:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 21:07:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,544 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 21:07:08,544 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 21:07:08,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 21:07:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 21:07:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 21:07:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 21:07:09,284 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 21:07:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:09,284 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 21:07:09,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 21:07:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:07:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:09,313 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 21:07:09,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 21:07:09,314 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 21:07:09,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:09,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734468810] [2020-08-18 21:07:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:09,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734468810] [2020-08-18 21:07:09,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:09,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:09,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378697693] [2020-08-18 21:07:09,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:09,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,346 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 21:07:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:10,047 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 21:07:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:10,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 21:07:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:10,106 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 21:07:10,106 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 21:07:10,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 21:07:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 21:07:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 21:07:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 21:07:11,026 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 21:07:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:11,026 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 21:07:11,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 21:07:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 21:07:11,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:11,073 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 21:07:11,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 21:07:11,074 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 21:07:11,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:11,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839499607] [2020-08-18 21:07:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:11,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839499607] [2020-08-18 21:07:11,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:11,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:11,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048309787] [2020-08-18 21:07:11,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:11,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:11,107 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 21:07:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:11,914 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 21:07:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:11,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 21:07:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:11,915 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 21:07:11,915 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:07:12,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:07:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:07:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:07:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:07:12,004 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 21:07:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:12,005 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:07:12,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:07:12,005 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:07:12,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 21:07:12,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:07:12,032 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:07:12,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:12,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:12,032 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:07:12,032 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:07:12,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:07:12,032 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,033 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,034 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,035 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 21:07:12,036 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,037 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 21:07:12,037 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 21:07:12,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:12 BoogieIcfgContainer [2020-08-18 21:07:12,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:12,051 INFO L168 Benchmark]: Toolchain (without parser) took 13479.26 ms. Allocated memory was 141.6 MB in the beginning and 1.0 GB in the end (delta: 867.2 MB). Free memory was 104.7 MB in the beginning and 445.9 MB in the end (delta: -341.3 MB). Peak memory consumption was 525.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:12,051 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:07:12,052 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.71 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:12,053 INFO L168 Benchmark]: Boogie Preprocessor took 136.94 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 182.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:12,053 INFO L168 Benchmark]: RCFGBuilder took 431.70 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 161.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:12,054 INFO L168 Benchmark]: TraceAbstraction took 12642.52 ms. Allocated memory was 205.0 MB in the beginning and 1.0 GB in the end (delta: 803.7 MB). Free memory was 161.8 MB in the beginning and 445.9 MB in the end (delta: -284.1 MB). Peak memory consumption was 519.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:12,056 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.71 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.94 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 182.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.70 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 161.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12642.52 ms. Allocated memory was 205.0 MB in the beginning and 1.0 GB in the end (delta: 803.7 MB). Free memory was 161.8 MB in the beginning and 445.9 MB in the end (delta: -284.1 MB). Peak memory consumption was 519.6 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: 12.5s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.0s, 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: 5.7s 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...