/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:40:04,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:40:04,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:40:04,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:40:04,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:40:04,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:40:04,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:40:04,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:40:04,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:40:04,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:40:04,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:40:04,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:40:04,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:40:04,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:40:04,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:40:04,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:40:04,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:40:04,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:40:04,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:40:04,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:40:04,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:40:04,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:40:04,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:40:04,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:40:04,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 04:40:04,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:40:04,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:40:04,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:40:04,096 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 [2020-08-22 04:40:04,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:40:04,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:40:04,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:40:04,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:40:04,121 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:40:04,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:40:04,121 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:40:04,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:40:04,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:40:04,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:40:04,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:40:04,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:40:04,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:40:04,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:40:04,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:40:04,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:40:04,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:40:04,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:40:04,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:40:04,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:40:04,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:40:04,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:40:04,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:40:04,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:40:04,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:40:04,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:40:04,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:40:04,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:40:04,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:40:04,126 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:40:04,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:40:04,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:40:04,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:40:04,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:40:04,484 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:40:04,484 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 04:40:04,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecb33368b/d002932e17ff4c1fabd3aab5baf3541b/FLAG6c64bb4f2 [2020-08-22 04:40:04,989 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:40:04,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 04:40:04,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecb33368b/d002932e17ff4c1fabd3aab5baf3541b/FLAG6c64bb4f2 [2020-08-22 04:40:05,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ecb33368b/d002932e17ff4c1fabd3aab5baf3541b [2020-08-22 04:40:05,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:40:05,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:40:05,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:40:05,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:40:05,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:40:05,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac0f60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05, skipping insertion in model container [2020-08-22 04:40:05,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:40:05,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:40:05,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:40:05,715 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:40:05,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:40:05,755 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:40:05,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05 WrapperNode [2020-08-22 04:40:05,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:40:05,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:40:05,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:40:05,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:40:05,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (1/1) ... [2020-08-22 04:40:05,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:40:05,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:40:05,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:40:05,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:40:05,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (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 [2020-08-22 04:40:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:40:05,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:40:05,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:40:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:40:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:40:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:40:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:40:05,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:40:06,274 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:40:06,274 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 04:40:06,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:40:06 BoogieIcfgContainer [2020-08-22 04:40:06,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:40:06,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:40:06,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:40:06,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:40:06,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:40:05" (1/3) ... [2020-08-22 04:40:06,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1393b4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:40:06, skipping insertion in model container [2020-08-22 04:40:06,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:40:05" (2/3) ... [2020-08-22 04:40:06,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1393b4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:40:06, skipping insertion in model container [2020-08-22 04:40:06,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:40:06" (3/3) ... [2020-08-22 04:40:06,295 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-22 04:40:06,304 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:40:06,311 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:40:06,325 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:40:06,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:40:06,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:40:06,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:40:06,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:40:06,352 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:40:06,352 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:40:06,352 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:40:06,352 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:40:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 04:40:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:40:06,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:06,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:06,378 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-22 04:40:06,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130172566] [2020-08-22 04:40:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:06,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130172566] [2020-08-22 04:40:06,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:06,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:06,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116688201] [2020-08-22 04:40:06,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:06,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:06,600 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-22 04:40:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:06,656 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-22 04:40:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:06,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 04:40:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:06,670 INFO L225 Difference]: With dead ends: 75 [2020-08-22 04:40:06,670 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:40:06,674 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 [2020-08-22 04:40:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:40:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 04:40:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 04:40:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-22 04:40:06,724 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-22 04:40:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:06,724 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-22 04:40:06,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-22 04:40:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 04:40:06,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:06,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:06,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:40:06,727 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-22 04:40:06,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:06,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32509626] [2020-08-22 04:40:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:06,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32509626] [2020-08-22 04:40:06,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:06,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:06,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587529556] [2020-08-22 04:40:06,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:06,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:06,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:06,798 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-22 04:40:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:06,830 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-22 04:40:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:06,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 04:40:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:06,833 INFO L225 Difference]: With dead ends: 97 [2020-08-22 04:40:06,833 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:40:06,834 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 [2020-08-22 04:40:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:40:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-22 04:40:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 04:40:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-22 04:40:06,845 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-22 04:40:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:06,846 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-22 04:40:06,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-22 04:40:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:40:06,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:06,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:06,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:40:06,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-22 04:40:06,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:06,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802140748] [2020-08-22 04:40:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:06,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802140748] [2020-08-22 04:40:06,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:06,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:06,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765927658] [2020-08-22 04:40:06,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:06,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:06,906 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-22 04:40:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:06,928 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-22 04:40:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:06,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 04:40:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:06,931 INFO L225 Difference]: With dead ends: 90 [2020-08-22 04:40:06,931 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 04:40:06,932 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 [2020-08-22 04:40:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 04:40:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 04:40:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 04:40:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-22 04:40:06,943 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-22 04:40:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:06,944 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-22 04:40:06,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-22 04:40:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:40:06,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:06,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:06,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:40:06,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:06,946 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-22 04:40:06,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:06,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164875142] [2020-08-22 04:40:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:06,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164875142] [2020-08-22 04:40:06,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:06,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:06,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502994532] [2020-08-22 04:40:06,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:06,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:06,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:06,998 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-22 04:40:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,043 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-22 04:40:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 04:40:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,045 INFO L225 Difference]: With dead ends: 112 [2020-08-22 04:40:07,046 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 04:40:07,046 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 [2020-08-22 04:40:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 04:40:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-22 04:40:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 04:40:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-22 04:40:07,062 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-22 04:40:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,062 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-22 04:40:07,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-22 04:40:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 04:40:07,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:40:07,065 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-22 04:40:07,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394219136] [2020-08-22 04:40:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394219136] [2020-08-22 04:40:07,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220933455] [2020-08-22 04:40:07,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,107 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-22 04:40:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,128 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-22 04:40:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 04:40:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,131 INFO L225 Difference]: With dead ends: 184 [2020-08-22 04:40:07,131 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 04:40:07,132 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 [2020-08-22 04:40:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 04:40:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-22 04:40:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 04:40:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-22 04:40:07,144 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-22 04:40:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,144 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-22 04:40:07,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-22 04:40:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:40:07,147 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-22 04:40:07,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506685169] [2020-08-22 04:40:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506685169] [2020-08-22 04:40:07,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759578225] [2020-08-22 04:40:07,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,199 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-22 04:40:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,218 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-22 04:40:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,220 INFO L225 Difference]: With dead ends: 165 [2020-08-22 04:40:07,220 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 04:40:07,221 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 [2020-08-22 04:40:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 04:40:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-22 04:40:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 04:40:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-22 04:40:07,232 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-22 04:40:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,233 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-22 04:40:07,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-22 04:40:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:40:07,235 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-22 04:40:07,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278808514] [2020-08-22 04:40:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278808514] [2020-08-22 04:40:07,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040664323] [2020-08-22 04:40:07,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,297 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-22 04:40:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,317 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-22 04:40:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,320 INFO L225 Difference]: With dead ends: 204 [2020-08-22 04:40:07,320 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 04:40:07,321 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 [2020-08-22 04:40:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 04:40:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-22 04:40:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 04:40:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-22 04:40:07,334 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-22 04:40:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,335 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-22 04:40:07,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-22 04:40:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:40:07,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:07,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:40:07,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-22 04:40:07,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131767540] [2020-08-22 04:40:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131767540] [2020-08-22 04:40:07,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157757422] [2020-08-22 04:40:07,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,410 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-22 04:40:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,434 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-22 04:40:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 04:40:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,437 INFO L225 Difference]: With dead ends: 352 [2020-08-22 04:40:07,437 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 04:40:07,439 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 [2020-08-22 04:40:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 04:40:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-22 04:40:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 04:40:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-22 04:40:07,453 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-22 04:40:07,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,453 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-22 04:40:07,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-22 04:40:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,455 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] [2020-08-22 04:40:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:40:07,456 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-22 04:40:07,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021984803] [2020-08-22 04:40:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021984803] [2020-08-22 04:40:07,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803581367] [2020-08-22 04:40:07,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,489 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-22 04:40:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,506 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 04:40:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,509 INFO L225 Difference]: With dead ends: 312 [2020-08-22 04:40:07,509 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 04:40:07,510 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 [2020-08-22 04:40:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 04:40:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-22 04:40:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 04:40:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-22 04:40:07,520 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-22 04:40:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,521 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-22 04:40:07,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-22 04:40:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,523 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] [2020-08-22 04:40:07,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:40:07,523 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-22 04:40:07,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389202948] [2020-08-22 04:40:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389202948] [2020-08-22 04:40:07,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157549409] [2020-08-22 04:40:07,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,551 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-22 04:40:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,570 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-22 04:40:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,573 INFO L225 Difference]: With dead ends: 380 [2020-08-22 04:40:07,573 INFO L226 Difference]: Without dead ends: 378 [2020-08-22 04:40:07,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-22 04:40:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-22 04:40:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 04:40:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-22 04:40:07,585 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-22 04:40:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,585 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-22 04:40:07,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-22 04:40:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:40:07,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,588 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] [2020-08-22 04:40:07,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:40:07,588 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-22 04:40:07,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013960535] [2020-08-22 04:40:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013960535] [2020-08-22 04:40:07,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845320076] [2020-08-22 04:40:07,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,617 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-22 04:40:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,647 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-22 04:40:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:40:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,650 INFO L225 Difference]: With dead ends: 684 [2020-08-22 04:40:07,651 INFO L226 Difference]: Without dead ends: 402 [2020-08-22 04:40:07,652 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 [2020-08-22 04:40:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-22 04:40:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-22 04:40:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 04:40:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-22 04:40:07,668 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-22 04:40:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,668 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-22 04:40:07,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-22 04:40:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,670 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] [2020-08-22 04:40:07,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:40:07,671 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-22 04:40:07,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490154982] [2020-08-22 04:40:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490154982] [2020-08-22 04:40:07,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751248155] [2020-08-22 04:40:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,698 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-22 04:40:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,718 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-22 04:40:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,721 INFO L225 Difference]: With dead ends: 600 [2020-08-22 04:40:07,721 INFO L226 Difference]: Without dead ends: 410 [2020-08-22 04:40:07,722 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 [2020-08-22 04:40:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-22 04:40:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-22 04:40:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-22 04:40:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-22 04:40:07,735 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-22 04:40:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,736 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-22 04:40:07,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-22 04:40:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,737 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] [2020-08-22 04:40:07,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:40:07,738 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-22 04:40:07,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565304883] [2020-08-22 04:40:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565304883] [2020-08-22 04:40:07,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477140585] [2020-08-22 04:40:07,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,766 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-22 04:40:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,787 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-22 04:40:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,792 INFO L225 Difference]: With dead ends: 716 [2020-08-22 04:40:07,792 INFO L226 Difference]: Without dead ends: 714 [2020-08-22 04:40:07,793 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 [2020-08-22 04:40:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-22 04:40:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-22 04:40:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 04:40:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-22 04:40:07,810 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-22 04:40:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,811 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-22 04:40:07,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-22 04:40:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:40:07,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,813 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] [2020-08-22 04:40:07,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:40:07,813 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-22 04:40:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579362592] [2020-08-22 04:40:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579362592] [2020-08-22 04:40:07,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930874000] [2020-08-22 04:40:07,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,840 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-22 04:40:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,866 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-22 04:40:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 04:40:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,870 INFO L225 Difference]: With dead ends: 1340 [2020-08-22 04:40:07,871 INFO L226 Difference]: Without dead ends: 778 [2020-08-22 04:40:07,872 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 [2020-08-22 04:40:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-22 04:40:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-22 04:40:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 04:40:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-22 04:40:07,894 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-22 04:40:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,894 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-22 04:40:07,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-22 04:40:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:07,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,896 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] [2020-08-22 04:40:07,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:40:07,896 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-22 04:40:07,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727098832] [2020-08-22 04:40:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:07,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727098832] [2020-08-22 04:40:07,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:07,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:07,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95275974] [2020-08-22 04:40:07,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:07,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:07,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:07,920 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-22 04:40:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:07,946 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-22 04:40:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:07,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:07,951 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 04:40:07,951 INFO L226 Difference]: Without dead ends: 794 [2020-08-22 04:40:07,952 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 [2020-08-22 04:40:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-22 04:40:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-22 04:40:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 04:40:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-22 04:40:07,978 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-22 04:40:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:07,978 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-22 04:40:07,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-22 04:40:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:07,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:07,980 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] [2020-08-22 04:40:07,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:40:07,981 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-22 04:40:07,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:07,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742129061] [2020-08-22 04:40:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742129061] [2020-08-22 04:40:08,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711699973] [2020-08-22 04:40:08,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,007 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-22 04:40:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,042 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-22 04:40:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,049 INFO L225 Difference]: With dead ends: 1356 [2020-08-22 04:40:08,049 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 04:40:08,050 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 [2020-08-22 04:40:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 04:40:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-22 04:40:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-22 04:40:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-22 04:40:08,097 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-22 04:40:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,098 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-22 04:40:08,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-22 04:40:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 04:40:08,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,100 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] [2020-08-22 04:40:08,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:40:08,101 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-22 04:40:08,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339964276] [2020-08-22 04:40:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339964276] [2020-08-22 04:40:08,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854461142] [2020-08-22 04:40:08,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,122 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-22 04:40:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,160 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-22 04:40:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 04:40:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,167 INFO L225 Difference]: With dead ends: 2636 [2020-08-22 04:40:08,167 INFO L226 Difference]: Without dead ends: 1514 [2020-08-22 04:40:08,170 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 [2020-08-22 04:40:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-22 04:40:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-22 04:40:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-22 04:40:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-22 04:40:08,211 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-22 04:40:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,211 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-22 04:40:08,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-22 04:40:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,214 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] [2020-08-22 04:40:08,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:40:08,214 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-22 04:40:08,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209338022] [2020-08-22 04:40:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209338022] [2020-08-22 04:40:08,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997746332] [2020-08-22 04:40:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,236 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-22 04:40:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,270 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-22 04:40:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,277 INFO L225 Difference]: With dead ends: 2268 [2020-08-22 04:40:08,278 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 04:40:08,280 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 [2020-08-22 04:40:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 04:40:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-22 04:40:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 04:40:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-22 04:40:08,322 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-22 04:40:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,323 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-22 04:40:08,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-22 04:40:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,325 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] [2020-08-22 04:40:08,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:40:08,325 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-22 04:40:08,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597975471] [2020-08-22 04:40:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597975471] [2020-08-22 04:40:08,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221699038] [2020-08-22 04:40:08,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,346 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-22 04:40:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,394 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-22 04:40:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,405 INFO L225 Difference]: With dead ends: 2572 [2020-08-22 04:40:08,405 INFO L226 Difference]: Without dead ends: 2570 [2020-08-22 04:40:08,407 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 [2020-08-22 04:40:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-22 04:40:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-22 04:40:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-22 04:40:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-22 04:40:08,471 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-22 04:40:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,471 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-22 04:40:08,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-22 04:40:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:40:08,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:40:08,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:40:08,475 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-22 04:40:08,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986394882] [2020-08-22 04:40:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986394882] [2020-08-22 04:40:08,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785771324] [2020-08-22 04:40:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,496 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-22 04:40:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,579 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-22 04:40:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 04:40:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,591 INFO L225 Difference]: With dead ends: 5196 [2020-08-22 04:40:08,591 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 04:40:08,595 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 [2020-08-22 04:40:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 04:40:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-22 04:40:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-22 04:40:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-22 04:40:08,673 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-22 04:40:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,674 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-22 04:40:08,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-22 04:40:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:08,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,678 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] [2020-08-22 04:40:08,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:40:08,678 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,679 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-22 04:40:08,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056321283] [2020-08-22 04:40:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056321283] [2020-08-22 04:40:08,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064501112] [2020-08-22 04:40:08,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,699 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-22 04:40:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,750 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-22 04:40:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,761 INFO L225 Difference]: With dead ends: 4428 [2020-08-22 04:40:08,762 INFO L226 Difference]: Without dead ends: 3018 [2020-08-22 04:40:08,765 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 [2020-08-22 04:40:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-22 04:40:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-22 04:40:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 04:40:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-22 04:40:08,843 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-22 04:40:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:08,844 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-22 04:40:08,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-22 04:40:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:08,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:08,849 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] [2020-08-22 04:40:08,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:40:08,849 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-22 04:40:08,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:08,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130947806] [2020-08-22 04:40:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:08,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130947806] [2020-08-22 04:40:08,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:08,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:08,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174450739] [2020-08-22 04:40:08,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:08,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:08,875 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-22 04:40:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:08,966 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-22 04:40:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:08,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:08,980 INFO L225 Difference]: With dead ends: 8650 [2020-08-22 04:40:08,980 INFO L226 Difference]: Without dead ends: 3016 [2020-08-22 04:40:08,990 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 [2020-08-22 04:40:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-22 04:40:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-22 04:40:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 04:40:09,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-22 04:40:09,100 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-22 04:40:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,100 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-22 04:40:09,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-22 04:40:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 04:40:09,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:40:09,105 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] [2020-08-22 04:40:09,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:40:09,105 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:40:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:40:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-22 04:40:09,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:40:09,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506897047] [2020-08-22 04:40:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:40:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:40:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:40:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:40:09,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506897047] [2020-08-22 04:40:09,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:40:09,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:40:09,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129848158] [2020-08-22 04:40:09,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:40:09,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:40:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:40:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:40:09,131 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-22 04:40:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:40:09,167 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-22 04:40:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:40:09,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 04:40:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:40:09,168 INFO L225 Difference]: With dead ends: 3016 [2020-08-22 04:40:09,168 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 04:40:09,173 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 [2020-08-22 04:40:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 04:40:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 04:40:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 04:40:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 04:40:09,174 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 04:40:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:40:09,174 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 04:40:09,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:40:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 04:40:09,174 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 04:40:09,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:40:09,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 04:40:09,198 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 04:40:09,199 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 04:40:09,199 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-22 04:40:09,199 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,199 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-22 04:40:09,200 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-22 04:40:09,201 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,202 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-22 04:40:09,202 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,203 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,203 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-22 04:40:09,203 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-22 04:40:09,203 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 04:40:09,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:40:09 BoogieIcfgContainer [2020-08-22 04:40:09,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:40:09,217 INFO L168 Benchmark]: Toolchain (without parser) took 3801.17 ms. Allocated memory was 137.9 MB in the beginning and 306.2 MB in the end (delta: 168.3 MB). Free memory was 100.7 MB in the beginning and 215.0 MB in the end (delta: -114.3 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:09,218 INFO L168 Benchmark]: CDTParser took 0.74 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 04:40:09,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.09 ms. Allocated memory is still 137.9 MB. Free memory was 100.5 MB in the beginning and 90.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:09,219 INFO L168 Benchmark]: Boogie Preprocessor took 119.58 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.0 MB in the beginning and 178.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:09,219 INFO L168 Benchmark]: RCFGBuilder took 402.80 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 160.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:09,220 INFO L168 Benchmark]: TraceAbstraction took 2932.82 ms. Allocated memory was 200.8 MB in the beginning and 306.2 MB in the end (delta: 105.4 MB). Free memory was 160.1 MB in the beginning and 215.0 MB in the end (delta: -54.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-08-22 04:40:09,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.09 ms. Allocated memory is still 137.9 MB. Free memory was 100.5 MB in the beginning and 90.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.58 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.0 MB in the beginning and 178.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.80 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 160.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2932.82 ms. Allocated memory was 200.8 MB in the beginning and 306.2 MB in the end (delta: 105.4 MB). Free memory was 160.1 MB in the beginning and 215.0 MB in the end (delta: -54.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...